REMOVE

1. Agriculture
2. North America

WHAT

1. Atlas Map (2)
2. World Atlas (2)
3. Climate (1)
4. Geology (1)

WHERE

1. Africa (1)
2. Asia (1)
3. Central America (1)
4. South America (1)

WHO

1. Garden City Publishing Co … (1)
2. General Drafting Co., Inc … (1)
3. Hammond, C.S. (1)
4. McGraw-Hill Book Company (1)
5. Western Publishing Compan … (1)

WHEN

1. 1948 (1)
2. 1968 (1)