Mason, B. J. (1992). Preparation of soil sampling protocols: Sampling techniques and strategies. Las Vegas, Nev: Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency.
Παραπομπή Chicago StyleMason, Benjamin J. Preparation of Soil Sampling Protocols: Sampling Techniques and Strategies. Las Vegas, Nev: Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1992.
Παραπομπή MLAMason, Benjamin J. Preparation of Soil Sampling Protocols: Sampling Techniques and Strategies. Las Vegas, Nev: Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1992.
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