000 002630000a22001210004500
245 _aTextbook of servomechanisms
100 _aWest, J.C.
260 _aLondon
_bE.U.P.
_c1953
300 _a238 p., ill.
080 _a621-52
_bW4
041 _aEN
942 _cBK
999 _c52445
_d52445