00576ca0 a2200229ua 45000010006000000050017000060070003000230080041000260200024000670400009000910410014001000820015001141000025001292450047001542500013002012600059002143000018002733650009002915040009003005410021003096500016003301743720180503180834.0ta080218s1970           g     b000 u eng u  a0 340 05911 7c$.20  aMAIN1 aenghNULL14a516.8bABB1 aAbott, P.  .eAuthor10aTeach Yourself Trigonometry / cP. Abbott.  a2nd /b.  aLondon :bThe English Language Book Society  , c1970.  a204 ; cNULL.  a$.20  aNULL  eUGC4179-83h$.20 0aMathematics