00528cam a22001691  4500001000800000005001700008008004100025050001600066082000800082100004500090245008900135260003800224300003100262650001800293700002500311700002200336656497520241118161821.0760928s1962    maua          000 0 eng  00aQA531b.W32  a5141 aWelchons, A. M.q(Alvie M.),d1894-1952.10aModern trigonometryc[by] A. M. Welchons, W. R. Krickenberger, and Helen R. Pearson.  aBoston,bGinn and Companyc[1962]  a327, 81 p.billus.c24 cm. 0aTrigonometry.  aKrickenberger, W. R.  aPearson, Helen R.