00308naa a2200109 a 450000100080000000500110000800800410001910000180006024500470007826000090012577300640013418261702010-01-10       1972    bl ---       0--  u    #d1 aHARRIS, D. R.  aThe origins of agriculture in the tropics.  c1972  tAmerican Scientistgv. 60, n. 2, p. 180-193, Mar/Apr. 1972.