00349nam a2200133Ia 45000030006000000080041000060400015000471000033000622450040000952500010001352600041001455460012001860050017001980STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aRama Rao, N.; Subramanyam, C  aIntroduction to Higher Trigonometry  aFirst  bUniversal book service, Madrasc1947  aEnglish20220125170007.0