|   
                     
                     1968
                     
                    
                     
                     World Climate; Agriculture. World Precip
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     World Climate; Agriculture. World Precip
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     World Agriculture.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     World Agriculture.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     World Agriculture.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     World Agriculture.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     North America Thematic Maps.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     North America Thematic Maps.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     Canada Minerals; Energy. Canada Agricult
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     Canada Minerals; Energy. Canada Agricult
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     United States Agriculture.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     United States Agriculture.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     South America Thematic Maps.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     South America Thematic Maps.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     Europe (not including U.S.S.R.) Thematic
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     Europe (not including U.S.S.R.) Thematic
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     Asia Thematic Maps.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     Asia Thematic Maps.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     Africa Thematic Maps.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     Africa Thematic Maps.
                     
                    | 
      
        |   
                     
                     1968
                     
                    
                     
                     Oceania Thematic Maps.
                     
                    
                     
                     [School Atlas, World Atlas]
                     
                    
                     
                     Oceania Thematic Maps.
                     
                    |