TY  - RPRT
TI  - Letter Circular 378c: zoned municipalities -- by population groups; municipalities of more than 20,00 and less than 40,000 population
PY  - 1933
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 378c
DO  - 10.6028/NBS.LCIRC.378c
ER  -