000 002890000a22001330004500
245 _aShaft design data
100 _aMitchell, J.
260 _aLondon
_bBGMA
_c1970
440 _aTechnical memorandum
440 _aNo.1
080 _a621.824(083.3)
_bM5
041 _aEN
942 _cBK
999 _c109505
_d109505