Jay Helsel

2 books • 1 series



JAY D. HELSEL (California University of Pennsylvania USA)

Mar 16, 2002
Cover of Mechanical Drawing Board & CAD Techniques, Student Edition

Mechanical Drawing Board & CAD Techniques, Student Edition (FRENCH: MECHANICAL DRAWING)

Jan 1, 1979
Cover of Reading Engineering Drawings Through Conceptual Sketching

Reading Engineering Drawings Through Conceptual Sketching