TY  - RPRT
TI  - Screw thread standards for federal services; part I: unified, UNJ, unified miniature screw threads 
PY  - 1970
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS HB 28-1969p1
DO  - 10.6028/NBS.HB.28p11969
ER  -