United States. Environmental Protection Agency, Keith, L. H., Mueller, W., & Smith, D. L. (1992). Compilation of E.P.A's sampling and analysis methods. Michigan: Lewis Publishers.
Citación estilo ChicagoUnited States. Environmental Protection Agency, Lawrence H. Keith, William Mueller, y David L. Smith. Compilation of E.P.A's Sampling and Analysis Methods. Michigan: Lewis Publishers, 1992.
Cita MLAUnited States. Environmental Protection Agency, Lawrence H. Keith, William Mueller, y David L. Smith. Compilation of E.P.A's Sampling and Analysis Methods. Michigan: Lewis Publishers, 1992.
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