TY - BOOK AU - Choudhary, S.L., ed. AU - Nene, Y.L., ed. AU - Sharma, G.S., ed. TI - Ancient and medieval history of Indian agriculture and its relevance to sustainable agriculture in the 21st century proceeding of t he sumer school held from 28 May to 17 June 1999, Rajasthan collage of Agriculture, Udaypur PY - 2000/// CY - Udaipur PB - Rajasthan College of Agriculture ER -