TY  - RPRT
TI  - Publications of the National Bureau of Standards 1972 Catalog 
AU  - Oberholtzer, Betty L
PY  - 1973
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 305supp4
DO  - 10.6028/NBS.SP.305supp4
ER  -