WELTON, PAUL L.
Answer book for Shop mathematics at work. By Paul L. Welton & William W. Rogers.
WELTON, PAUL L. Answer book for Shop mathematics at work. By Paul L. Welton & William W. Rogers. © 6Feb43; AA420782. Hannah S. Welton (W of P. L. Welton); 15Dec70; R497049.
Hannah S. Welton|W of P. L. Welton