TY  - RPRT
TI  - Circular of the Bureau of Standards no. 601: recorder survey- recording surfaces and marking methods
AU  - Keinath, George
PY  - 1959
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 601
DO  - 10.6028/NBS.CIRC.601
ER  -