Johnson, L. J., & Johnson, L. J. (1979). Introductory soil science: A study guide and laboratory manual (1. edition --.). London, Sydney: Macmillan.
Chicago Style CitationJohnson, León J., and León J. Johnson. Introductory Soil Science: A Study Guide and Laboratory Manual. 1. edition --. London, Sydney: Macmillan, 1979.
MLA CitationJohnson, León J., and León J. Johnson. Introductory Soil Science: A Study Guide and Laboratory Manual. 1. edition --. London, Sydney: Macmillan, 1979.
Warning: These citations may not always be 100% accurate.