000 00256nam a2200109 4500
008 190611b1954 xxu||||| |||| 00| 0 eng d
041 _aeng
942 _cBK
100 _aTaylor, John W.
245 _aAbc of Helicopters
260 _aLondon
_bIan Allan
_c1954
999 _c177283
_d177283