Irrigation in India

The publications of the United States Geological Survey consist of ( 1) Annual Reports; (2) Monographs; (3) Professional Papers; (4) Bulletins; (5) Mineral Resources; (6) Water-Supply and Irrigation Papers; (7) Topography Atlas of the United States, folios and separate sheets thereof; (8) Geologic Atlas of United States, folios thereof.The classes numbered 2, 7, and 8 are sold at cost of publication: the others are distributed free.A circular giving complete lists may be had on application.The Bulletins, Professional Papers, and Water-Supply Papers treat of a variety of subjects, and the total number issued is large.They have therefore been classified into the following series: A, Economic geology; B, Descriptive geology; C, Systematic geology and paleontology;