Fletcher, F. W. (1997). Basic hydrogeologic methods: : a field and laboratory manual with microcomputer applications. Lancaster, PA.: Technomic Publishing Company.
Παραπομπή Chicago StyleFletcher, Frank W. Basic Hydrogeologic Methods: : A Field and Laboratory Manual With Microcomputer Applications. Lancaster, PA.: Technomic Publishing Company, 1997.
Παραπομπή MLAFletcher, Frank W. Basic Hydrogeologic Methods: : A Field and Laboratory Manual With Microcomputer Applications. Lancaster, PA.: Technomic Publishing Company, 1997.
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