TY  - BOOK
AU  - Graham,Frank Duncan
ED  - American Institute of Electrical Engineers.
TI  - Audels answers on blue print reading for mechanics and builders,
U1  - 720.284 
PY  - 1941///]
CY  - New York
PB  - T. Audel & co.
KW  - Blueprints
N1  - Chapter 10, "A.I.E.E. standards: standard symbols for electrical equipment of buildings" (p. 167-170) has special t.-p
ER  -