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050 _aQA 533 .D76 1967
100 _aDrooyan, Irving
245 _aTrigonometry:
_bAn Analytic Approach/
_cIrving Drooyan and Walter Hadel
260 _aNew York:
_bThe Macmillan Company,
_c1967.
300 _ax,358p.:
_bill.;
_c24cm.
521 _aIncludes index.
700 _aHadel, Walter
942 _2lcc
_cBOOKS
_hQA 533 .D76 1967