TY  - RPRT
TI  - X-ray protection design 
AU  - Wyckoff, Harold O
AU  - Taylor, Lauriston S
PY  - 1952
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS HB 50
DO  - 10.6028/NBS.HB.50
ER  -