TY  - BOOK
AU  - Spence,William Perkins
TI  - Drafting technology and practice,
SN  - 087002129X
AV  - T353 .S57
U1  - 604/.2 
PY  - 1973///]
CY  - Peoria, Ill.
PB  - C. A. Bennett
KW  - Mechanical drawing
ER  -