HARR, M. E. (1962). Groundwater And Seepace Milton E. Harr. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)HARR, Milton E. Groundwater And Seepace Milton E. Harr. McGraw-Hill, 1962.
Lua MLA (8ú heag.)HARR, Milton E. Groundwater And Seepace Milton E. Harr. McGraw-Hill, 1962.
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