http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
International Symposium on Soil Fertility Evaluation, Delhi, 1971.
[copies available from the Honorary Secretary, Indian Society of Soil Science]
[Editorial board: J. S. Kanwar and others]
Organized under the auspices of the International Society of Soil Science in joint collaboration with the Indian Society of Soil Science, the Indian Society of Agronomy, and the Indian Council of Agricultural Research.