UNITED STATES GEOLOGICAL SURVEY ANNUAL REPORTS. 21st ANNUAL REPORT, Vol. 1--Director's Report; U.S.Department of the Interior. Washington, D.C.
21st ANNUAL REPORT, Vol. 1--Director's Report; 21st ANNUAL REPORT, Vol. 3--General Geology. Ore and Phosphate Deposit. Philippine Geology; 21st ANNUAL REPORT, Vol. 4--Hydrography; 21st ANNUAL REPORT, Vol. 7--Geography and Geology of the Black and Grand Prairies, Texas; 22nd ANNUAL REPORT, Part I--Report of the Director; 22nd ANNUAL REPORT, Part II--Ore..... More