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008 180516s9999 xx 000 0 und d
041 1 0 _afre
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100 _aALTERNATIVE SOURCES OF ENERGY
245 1 0 _aSOLAR HEATED GREENHOUSES
260 1 0 _a
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_cFEV-MARS.1979
300 1 0 _a
_b
_c
_e
520 1 0 _a
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942 1 0 _c02
_t1927
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994 _a19270001
999 _c14637
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