TY  - RPRT
TI  - Letter Circular 290: publications of the Bureau of Standards relating to building materials, home building, home ownership, city planning, and zoning
PY  - 1930
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 290
DO  - 10.6028/NBS.LCIRC.290
ER  -