000 00314 a2200133 4500
020 _a0749261943
082 _a531.6
_bOPE
090 _c7971
_d11018
245 _aBlock 3 energy
_bliving with technology
260 _aWalton
_bOpen university
_c1993
_g1993
300 _a109p.
_c29cm
650 _aENERGY
942 _cSR
999 _c36647
_d36647