00235nam a22001097a 4500 621.4LAR Larsen Egon New Sources of energy and power London Frederide 1980 136 BK 12270 12270 0 0 0 0 QUESTCL QUESTCL 2015-02-11 172.36 0 621.4LAR 7107 2015-02-11 00:00:00 2015-02-11 BK