Bertoldi, G. (1991). Ground water in the Central Valley of California - A summary report. Denver: U.S. Geological Survey.
Styl ChicagoBertoldi, G.L. Ground Water in the Central Valley of California - A Summary Report. Denver: U.S. Geological Survey, 1991.
Citace podle MLABertoldi, G.L. Ground Water in the Central Valley of California - A Summary Report. Denver: U.S. Geological Survey, 1991.
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