Day, R. W. (2001). Soil testing manualprocedures, classiffication data, and sampling practices. McGraw-Hill.
Chicago-viite (17. p.)Day, Robert W. Soil Testing Manualprocedures, Classiffication Data, and Sampling Practices. McGraw-Hill, 2001.
MLA-viite (8. p.)Day, Robert W. Soil Testing Manualprocedures, Classiffication Data, and Sampling Practices. McGraw-Hill, 2001.
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