Hernando Grisanti A., Vadell Hermanos
$1.00
Margarita A. de Sanchez, Trillas
$25.00
Magaly Perretti de Parada, Liber
$6.00
H. Gutierrez-r.de la Vara, Mcgraw Hill
$50.00
Luis Eduardo Mendoza, Vadell
$6.00
Tolo M. Rimsky, Mcgraw Hill
$41.00
Emilia Bermudez, Cpluz
$6.00
S. Hernandez y Rodriguez, Mcgraw Hill
$52.34