TY  - BOOK
AU  - Ryan, Daniel L
TI  - Principles of automated drafting
SN  - 9780824771751
SN  - 83025201
U1  - 620.0042 RYA 
PY  - 1984///
CY  - New York
PB  - Marcel Dekker
KW  - Mechanical drawing - Automation
N1  - Includes index
ER  -