APA Citation

Riggs, H. (1969). Techniques of water- resources investigations of the united states geological survey: Frequency curves (2.bs.). Washington: United States Government Printing Office.

Chicago Style Citation

Riggs, H.C. Techniques of Water- Resources Investigations of the United States Geological Survey: Frequency Curves. 2.bs. Washington: United States Government Printing Office, 1969.

MLA Citation

Riggs, H.C. Techniques of Water- Resources Investigations of the United States Geological Survey: Frequency Curves. 2.bs. Washington: United States Government Printing Office, 1969.

Warning: These citations may not always be 100% accurate.