TY  - RPRT
TI  - Geophysical abstracts, 100-103, January-December 1940. Geophysical abstracts 100, January-March 1940
AU  - W. Ayvazoglou
PY  - 1940
DO  - 10.3133/b925a
UR  - https://pubs.usgs.gov/publication/b925A
ID  - b925A
ER  -