U. S. Environmental Protection Agency. (1983). Process design manual for land application of municipal sludge (1a. ed.). U. S. Environmental Protection Agency.
Chicago-viite (17. p.)U. S. Environmental Protection Agency. Process Design Manual for Land Application of Municipal Sludge. 1a. ed. Cincinnati: U. S. Environmental Protection Agency, 1983.
MLA-viite (9. p.)U. S. Environmental Protection Agency. Process Design Manual for Land Application of Municipal Sludge. 1a. ed. U. S. Environmental Protection Agency, 1983.
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