TY  - BOOK
AU  - Johnson,Raymond H.
ED  - United States.
TI  - Assessment of potential radiological health effects from radon in natural gas
U1  - 553.285 
PY  - 1973///
CY  - Washington, D.C.
PB  - U.S. Environmental Protection Agency
KW  - Natural gas
KW  - Geology
KW  - Coalbed methane
N1  - November 1973; EPA-520/1-73-004
ER  -