TY  - RPRT
TI  - Letter Circular 378a: zoned municipalities -- by population groups; municipalities having over 100,000 population
PY  - 1933
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 378a
DO  - 10.6028/NBS.LCIRC.378a
ER  -