M. Velhagen - E, Calderon, Trillas
$6.00
Alberto Arias Amaro, Romor
$7.00
Gaceta Nº 38.433, Njr
$1.26
M. Criado - J. Casa, Pearson
$18.00
Guerrero Hardy Alvaro, Funeda
$6.00
M. Width - T. Reinhard, Lippincott
$25.00
M. Morris Mano - Ch. Kime, Prentice Hall
$22.00
Gaceta No 5.022, Njr
$2.00
Gaceta No. 39.019, Njr
$2.00