01267cam a22003617a 4500 CHAP 20220329141851.0 980317d1995 us r 00110 eng d 75014 75986 0801429374 85560 CHAP 630.72 A55 Alston, Julian M. 4652 Science under scarcity : principles and practice for agricultural research evaluation and priority setting /by Julian M. Alston, George W. Norton and Philip G. Pardey Ithaca, N.Y. : Cornell University Press, 1995. 585 p. : gráfs. Food systems and agrarian change BATCH-UPD 10 20130110 UCH01 0640 BATCH-UPD 10 20130410 UCH01 0324 BATCH-UPD 10 20140805 UCH01 1147 CONVERSION 10 20130109 UCH01 1341 Agricultura Costos. 1385 Agricultura Investigación. 1577 Norton, George W. 81834 Pardey, Philip G. 85489 Food systems and agrarian change 42203 BK Lilia Sánchez G. LIBRO 630.72 A55 BC LIBRO 33724000591475 LIBRO 92596 85560 b 75014 75014 0 0 ddc 0 2 0 GRAL BC BC PP_GRAL 2019-12-31 LIBRO 0 630.72 A55 33724000591475 2019-12-31 00:00:00 2019-12-31 LIBRO