Soil Science Society of America, Bridger, G. L., Nelson, L. B., & McVickar, M. H. (1963). Fertilizer technology and usage: Proceedings of a short course sponsered by the Soil Science Society of America and held at Purdue University, Lafayette, Indiana, February 12-13, 1962. Soil Science Society of America.
Lua i Stíl Chicago (17ú heag.)Soil Science Society of America, G. L. Bridger, Lewis B. Nelson, agus Malcolm Hedley McVickar. Fertilizer Technology and Usage: Proceedings of a Short Course Sponsered by the Soil Science Society of America and Held at Purdue University, Lafayette, Indiana, February 12-13, 1962. Madison: Soil Science Society of America, 1963.
Lua MLA (9ú heag.)Soil Science Society of America, et al. Fertilizer Technology and Usage: Proceedings of a Short Course Sponsered by the Soil Science Society of America and Held at Purdue University, Lafayette, Indiana, February 12-13, 1962. Soil Science Society of America, 1963.