TY  - BOOK
AU  - Arnell, Alvin
TI  - STANDARD GRAPHICAL SYMBOLS
U1  - 620.00148 
PY  - 1963///
CY  - N. Y.
PB  - Mcgraw-Hill
KW  - Engineering -- Notation
KW  - Technology -- Notation
KW  - Science -- Notation
ER  -