Brown, J. R. (1998). Recommended chemical soil test procedures: For the North Central Region (Rev. ed.). Missouri Agricultural Experiment Station.
Citación estilo ChicagoBrown, J. R. Recommended Chemical Soil Test Procedures: For the North Central Region. Rev. ed. Columbia, MO: Missouri Agricultural Experiment Station, 1998.
Cita MLABrown, J. R. Recommended Chemical Soil Test Procedures: For the North Central Region. Rev. ed. Missouri Agricultural Experiment Station, 1998.
Warning: These citations may not always be 100% accurate.