004050000a220013300045000410008000000820017000081000029000252450072000542500006001262600041001323000017001735000075001900010006002650 aSPA04aG 908 L6731p1 aLewis, Oscar (1914-1970)10aPedro Martínez : Un campesino mexicano y su familia / Oscar Lewis  a2  aMéxico, D.F., México : J. Mortiz  aXLI, 459 Pag  aTítulo original : Pedro Martínez. A mexican peasant and his family11241