TY  - RPRT
TI  - Letter Circular 181: references on the subject of rubber (other than publications of the Bureau of Standards)
PY  - 1925
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 181
DO  - 10.6028/NBS.LCIRC.181
ER  -