00327nam a2200121Ia 4500008004100000100001600041245007600057260002300133300000900156650001600165942000700181999001700188190216s9999||||xx |||||||||||||| ||und||  aAyres Frank 0aTheory And Problems Of Plane And Spherical Trigonometry Schaum`S Series  bMcgraw -hillc1954  a207p  aMathematics  cBK  c30448d30448