WATKINS,FA. (1970). Electrical-Analog-Model study of water Resources the Columbus Area Bartholomeus Country,Indiana - FA Watkins. United States Goverment Printing office.
Chicago-viite (17. p.)WATKINS,FA. Electrical-Analog-Model Study of Water Resources the Columbus Area Bartholomeus Country,Indiana - FA Watkins. United States Goverment Printing office, 1970.
MLA-viite (8. p.)WATKINS,FA. Electrical-Analog-Model Study of Water Resources the Columbus Area Bartholomeus Country,Indiana - FA Watkins. United States Goverment Printing office, 1970.
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