REMOVE

1. Industry
2. Covers

WHAT

1. World Atlas (2)
2. Food (1)
3. Mining (1)

WHERE

1. Russia (2)
2. Pennsylvania (1)

WHO

1. Gorkin, Aleksandr Fedorov … (2)
2. Motylev, V.E. (2)
3. Nauchno-izdatelskim Insti … (2)
4. Nikitin, M. V. (2)
5. Shaposhnikova, B. M. (2)

WHEN

1. 1937 (2)
2. 1939 (2)
3. 1884 (1)