TY  - RPRT
TI  - Letter Circular 378f: zone municipalities -- by population groups; municipalities of more than 3,000 and less than 5,000 population
PY  - 1933
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 378f
DO  - 10.6028/NBS.LCIRC.378f
ER  -