United States Department of Agriculture. (1956). Water: The yearbook of agriculture 1955. The United States Government Printing Office.
Chicago-čujuhus (17. p.)United States Department of Agriculture. Water: The Yearbook of Agriculture 1955. Washington, D.C: The United States Government Printing Office, 1956.
MLA-čujuhus (9. p.)United States Department of Agriculture. Water: The Yearbook of Agriculture 1955. The United States Government Printing Office, 1956.
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