REMOVE

1. Covers
2. Mining
3. Coal
4. Geology
5. Petrascheck, W.
6. David, T.W.E.

WHAT

1. Atlas Map (1)
2. World Atlas (1)

WHERE

1. Africa (1)
2. Algeria (1)
3. Tunisia (1)

WHO

1. Ambrosius, E. (1)
2. Andree, Richard (1)
3. Bludau, A. (1)
4. Endlich, M. (1)
5. Jungk, G. (1)

WHEN

1. 1905 (1)
2. 1906 (1)