SPENCER, HENRY C.
Technical drawing problems; series 2, by Henry C. Spencer & Hiram E. Grant. NM: 16 additional problem sheets.
SPENCER, HENRY C. Technical drawing problems; series 2, by Henry C. Spencer & Hiram E. Grant. NM: 16 additional problem sheets. © 1Mar45; AA483530. H. C. Spencer & H. E. Grant (A); 22Mar72; R525906.
H. C. Spencer & H. E. Grant|A