KUMAR Birendra Sustainable agriculture for food security Concepts and approaches KUMAR Birendra; SINGH Rabir - New Delhi Biotech Books 2018 - xii,256p cm. ISBN: 9788176224116 1900.00 Source: 2600, 10/10/2017, The Bookseller General Book Subjects--Topical Terms: Geography Dewey Class. No.: U672(J3):54, Q8