D. Eiteman - A. Stonehill, Prentice Hall
$35.00
Gaceta Nº 39.610, la Piedra
$2.50
Gaceta N. 40.639, la Piedra
$4.00
J.m. Smith - H. Van Ness, Mcgraw Hill
$89.00
Gaceta N. 37.625 - 37.627, la Piedra
$0.70
M. Width - T. Reinhard, Lippincott
$25.00