VTG International Library - 19 Textbooks - HVAC-Pipe fitting-Mechanics-Drawing

The Mechanics' Handbook International Correspondence Schools Reference Book 1924

1933 International Textbook Company Steam Boilers and Boiler Mountings 228B

Vintage 1904 Elements Of Algebra Book International Correspondence Schools

Boiler Feeding and Flue Gas Analysis International Textbook Company #381 B

1933 Lot of 12 International Textbook Company - Oil and Gas, Boilers, Dc Motors

I.C.S. Reference Library - Textbook International Correspondence Schools - 1908

International Library of Technology #392D The Steam Engine 1928