https://opac.ru.ac.bd/cgi-bin/koha/opac-search.pl?q=ccl=copydate%3A%22c1940%20%5BPrinting%201947%5D.%22&sort_by=relevance&format=rss 2 0 100 ISBN: https://opac.ru.ac.bd/cgi-bin/koha/opac-detail.pl?biblionumber=51884 New York : Bureau of Publications, Teachers College, Columbia University, 1940 .
xvi, 253 p. : , At the head of Title: The National Council of Teachers of Mathematics :Fifteenth Yearbook 24 cm..

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]]> https://opac.ru.ac.bd/cgi-bin/koha/opac-detail.pl?biblionumber=51884 ISBN: https://opac.ru.ac.bd/cgi-bin/koha/opac-detail.pl?biblionumber=71502 By Huntington, Ellsworth.
New York, | London, Wiley & sons, inc. : | Chapman & Hall limited, 1940 .
x, 715 p. : 24 cm..

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