00371nam a2200133Ia 4500 140224s9999 xx 000 0 und d 620.91 1977 L7 Energy fact book-1977 Virginia Tetra Tech 1977 xvii,vp. National Technical Information Service TT-A-643-77-306 Energy Conservation BK 0 0 0 0 KSD KSD 2014-02-24 0 620.91 1977 L7 1996 2014-02-24 00:00:00 2014-02-24 BK 92797 92797