Dyfyniad APA

Clarke, D. (1987). Microcomputer programs for groundwater studies. Elsevier.

Dyfyniad Arddull Chicago

Clarke, David. Microcomputer Programs for Groundwater Studies. Amsterdam ; New York: Elsevier, 1987.

Dyfyniad MLA

Clarke, David. Microcomputer Programs for Groundwater Studies. Elsevier, 1987.

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