TY  - BOOK
AU  - Wellman, Leighton, B,
TI  - Technical Descriptive Geometry
U1  - 516 WEL 
PY  - 1948///
CY  - New York
PB  - McGraw-Hill Book Company,Inc
KW  - Geometry
KW  - Double-Curved Surface,Warped Surface,Points and Lines,Dihedral Angle,Intersecting Lines
ER  -