00604nam a2200253Ia 4500 20251007214652.0 251006t1966||||xx |||||||||||||| ||und|| en CBC donación BIB/07.01.01/02630 Clark, Colin Haswell, Margaret The economics of subsistence agriculture New York : Macmillan, 1966 216 p. : grafs., tbls AGRICULTURA ASPECTOS AGRICOLAS PRODUCTIVIDAD MJCh 15526 15526