De Datta, S. K. A handbook on the methodology for an integrated experiment-survey on-rice yield constraints / S. K. De Datta, K. A. Gomez, R.W. Herdt & R. Barker - Manila : IRRI , 1978 - 59p. : ill. ; 28 cm. Includes bibliographical references. Subjects--Topical Terms: RiceManualsHandbooksResearch and development Dewey Class. No.: R/633.18 / DAT