na INLIS000000000000400 20260225110930 0010-0317000398 260225 0 Alternative energy sources : a strategy planning guide... / Richard T. Sheahan Sheahan, Richard T. An Aspen Publication, 1981 ix, 252 hlm. ; 24 cm 621.042 She a 621.042 TENAGA (MEKANIKA) 296387212