00326nam a2200097Ia 4500245003600000100003100036942000700067008004100074999001900115952009400134 0aWater power : is it efficient?   a Pipe, Jim  London, 2010    cBK210817s9999    xx            000 0 und d  c330178d330177  00104070aEMJILbEMJILd2021-08-19g90.00l0p3228200005096r2021-08-19w2021-08-19yBK