International Symposium on Distribution, Characteristics and Utilization of Problem Soils Tsukuba, & Nihon Dojo Hiryo Gakkai. (1982). Proceedings of a symposium on tropical agriculture research, Tsukuba, October 19-26, 1981. Japanese Society of Soil Science and Plant Nutrition.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Symposium on Distribution, Characteristics and Utilization of Problem Soils Tsukuba, και Nihon Dojo Hiryo Gakkai. Proceedings of a Symposium on Tropical Agriculture Research, Tsukuba, October 19-26, 1981. Tokyo: Japanese Society of Soil Science and Plant Nutrition, 1982.
Παραπομπή σε μορφή MLA (9th εκδ.)International Symposium on Distribution, Characteristics and Utilization of Problem Soils Tsukuba, και Nihon Dojo Hiryo Gakkai. Proceedings of a Symposium on Tropical Agriculture Research, Tsukuba, October 19-26, 1981. Japanese Society of Soil Science and Plant Nutrition, 1982.