TY  - RPRT
TI  - Letter Circular 998: electric batteries and standard cells publications by the staff of the National Bureau of Standards and references to other sources of information (supersedes Letter Circular 904)
PY  - 1951
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 998
DO  - 10.6028/NBS.LCIRC.998
ER  -