M. Velhagen - E. Calderon, Trillas
$6.00
H. Gutierrez-r.de la Vara, Mcgraw Hill
$50.00
Gaceta Nº 40.157, Njr
$3.50
C. Stone - R. Humphries, Mcgraw Hill
$90.00
Dr. Ing. Harry Osers, Refolit C.a.
$12.28
Angel R. Fajardo H., Editorial Nus Caracas
$5.40
Gaceta Nº 5.940, Ml
$3.00
Ciro Fernando Camerlingo, Buchivacoa
$8.50
M. Width - T. Reinhard, Lippincott
$25.00
J. Garcia - J. Lopez, Mcgraw Hill
$47.00
W. Smith - J. Hashemi, Mcgraw Hill
$68.00
