TY  - RPRT
TI  - Letter Circular 504: variety reduction effected by the application of simplified practice through cooperative efforts of industry and the National Bureau of Standards
PY  - 1937
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 504
DO  - 10.6028/NBS.LCIRC.504
ER  -