00315nam a2200133Ia 45000030006000000080041000060400015000471000017000622450035000792500011001142600027001255460012001520050017001640STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHobson, E.W.  aTreatise on Plane Trigonometry  aFourth  bUniversity pressc1918  aEnglish20220125170009.0