TY  - BOOK
AU  - Arnell,Avin
TI  - Standard graphical symbol: a comprehensive guide for use in industry engineering and science
AV  - QTO TA11.A7 
PY  - 1963///
CY  -  :New York
PB  - McGraw-Hill
KW  - Engineering
KW  - Notation
KW  - Technology
KW  - Science
KW  - Graphical symbol
ER  -