TY  - BOOK
AU  - Carroll,Herbert B.
AU  - Armstrong,F.E.
ED  - United States.
TI  - Accuracy and precision of several portable gas detectors: additional studies, a supplement to RI 7811 
T2  - Report of investigations / Bureau of Mines, U.S. Dept. of the Interior
PY  - 1975///
CY  - Washington, D.C.
PB  - Dept. of the Interior
KW  - Mine gases
KW  - Gas-detectors
ER  -