00291nam a2200109Ia 450000500170000000800410001705000160005810000150007424500450008926000290013465000180016320251229085757.0251229s9999    xx            000 0 und d  aTJ 810 .D28  aDaniel, F. 0aDirect use of the suns energy.cF Daniel  aLondonbWisconsin c1964  aSolar Energy.