TY  - BOOK
AU  - Polon,David D.
TI  - Encyclopedia of engineering signs and symbols
U1  -  620.00148. 
PY  - 1965///
CY  - New York
PB  - Odyssey Press
KW  - Engineering
KW  - Notation
N1  - At head of title: EESS; Includes index
ER  -