Edited by J. S. Kanwar [and] S. P. Ray ChaudhuriOrganizing Secretary, International Symposium on Soil Fertility Evaluation, Indian Society of Soil Science1971]
by S.P. Raychaudhuri [chief soil survey officer, and others. General editor: D. Raghavan. Technical editor: P. Kachroo]Indian Council of Agricultural Research[1963]