https://opac.ru.ac.bd/cgi-bin/koha/opac-search.pl?q=ccl=an%3A138718&sort_by=relevance&format=rss 2 0 100 ISBN: https://opac.ru.ac.bd/cgi-bin/koha/opac-detail.pl?biblionumber=45287 By Carslaw, H. S..
Australia : Angus & Robertson, 1927 .
152 p. : , Based upon author's Easy numerical trigonometry of the right-angled triangle. 18 cm..

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]]> https://opac.ru.ac.bd/cgi-bin/koha/opac-detail.pl?biblionumber=45287 ISBN: https://opac.ru.ac.bd/cgi-bin/koha/opac-detail.pl?biblionumber=71475 By Carslaw, H. S..
New York : Dover Publications, 1930 .
xiii, 368 p. : , "An unabridged and unaltered republication of the third edition, published by Macmillan and Company, Ltd., in 1930." 21 cm..

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