na INLIS000000000000052 20210430103159 210430||||||||| | ||| |||| || | 010-0421000052 id 633.18 633.18 IRR f IRRI Farm level constraints to high rice yields in Asia: 1974-77 Cet. 1 Los Banos IRRI 1797 x, 411 hlm.: ill.; 23 cm. PADI