Patents on geophysical prospecting issued in the United States, England, Canada, Australia, Germany, France, and Russia

Author:	Ayvazoglou, W.
Year:	1936
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:6883
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	XXXX
Subjects:	Geophysics
	Prospecting
Link:	https://hdl.handle.net/2027/mdp.39015077569294