000 00339nam a2200145Ia 4500
020 _a0863139388
082 _b.855
_a000
100 _a"Graham Ian"
245 0 _aHow It Works - Helicopters
260 _bLondon; Gloucester Press
_c1989
300 _a32
944 _cBK
999 _c478325
_d478325