Improving the efficiency of your gas heating system.
| Other author | United States. Department of Energy. Office of Building Technologies. |
| Format | Book |
| Publication Info | Washington, D.C. : U.S. Dept. of Energy, Assistant Secretary of Conservation and Renewable Energy, Office of Building Technologies, [1991] |
| Description | 12 pages : illustrations ; 22 cm |
| Subjects |
| General note | Shipping list no.: 91-0600-P. |
| General note | "March 1991." |
| GPO item number | 0429-H-4 |
| Govt. docs number | E 1.89:0338 P |