00333nam a2200133Ia 4500008004100000082001600041100002200057245001400079260003200093300000800125650003400133650001800167653001400185170901s1961    xx            000 0 und d  a526.3bT36S  aThomas, W. Norman 0aSurveying  aLondonbEdward Arnoldc1961  a643  aAstronomy and allied sciences  aPure Sciences  aSurveying