Henry Cecil Spencer & Hiram E. Grant.
Technical drawing problems, series 2.
R618295. Technical drawing problems, series 2. By Henry Cecil Spencer & Hiram E. Grant. © 7Sep48; AA92505. Hiram E. Grant (A) & Juanita M. Spencer (W); 7Nov75; R618295.
Hiram E. Grant|A||Juanita M. Spencer|W