00665cam a22002053a 450000100060000000300060000600500170001200800410002904000150007004200070008505000070009210000320009924501550013126000290028650600300031551600200034565300230036583000290038885600420041732973PGUSA20140828083719.0100625s2010||||xxu|||||s|||||000 | eng d  aPGUSAbeng  adc 4aQA1 aBlackburn, Hugh,d1823-190910aElements of Plane Trigonometry :bFor the use of the junior class of mathematics in the University of Glasgowh[electronic resource] /cHugh Blackburn  bProject Gutenberg,c2010  aPublic domain in the USA.  aElectronic text  aPlane trigonometry 0aProject Gutenbergv3297340uhttp://www.gutenberg.org/ebooks/32973