000 00305cam a2200133 4500
020 _a(hbk.)
100 1 _aO'BRIEN Robert
245 0 _aMachines
250 _a2nd ed.
260 _aNew York:
_bTime-Life Books,
_c1972, reprint 1977
300 _a200p.
440 _aLife science library
945 _i0011469
_rY
_sY
999 _c27
_d27