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1. Periodical events in the north sea basin

by Umbgrove, J.H.F.

Source: Geological magazine : Vol. 82 Iss. 1-6 Year. 1945Material type: Article Article; Format: print Availability: Items available for reference: (1).

2. Geological History of the East Indies

by Umbgrove, J.H.F.

Source: Geological magazine : Vol. 75 Iss. 1-12 Year. 1938Material type: Article Article; Format: print Availability: Items available for reference: (1).

3. On rhythms in the history of the earth

by Umbgrove, J.H.F.

Source: Geological magazine : Vol. 76 Iss. 1-12 Year. 1939Material type: Article Article; Format: print Availability: Items available for reference: (1).

4. The relation between magmatic cycles and orogenic epochs

by Umbgrove, J. H. F.

Source: Geological magazine : Vol. 76 Iss. 1-12 Year. 1939Material type: Article Article; Format: print Availability: Items available for reference: (1).

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