/cgi-bin/koha/opac-search.pl?q=ccl=su%3A%7BMayflies%7D&sort_by=relevance&format=rss 2 0 20 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=8842 By Murphy, Helen Elizabeth,.
[Cincinnati, 1922 .
46 p. , Descriptive letterpress on versos facing the plates. | Contribution from the Limnological Laboratory, Cornell University. | Also issued as thesis (PH. D.) Cornell University, 1920. 27 cm..

]]> Place hold on Notes on the biology of some of our North American species of May-flies.

]]> /cgi-bin/koha/opac-detail.pl?biblionumber=8842 ISBN: /cgi-bin/koha/opac-detail.pl?biblionumber=23249 By Needham, James G..
Washington, Govt. Print. Off., 1920 .
267-292 p. incl. tables., plates. , From Bulletin of the Bureau of fisheris, vol xxxvi, 1917-1918. | Plates printed on both sides. 28 cm..

]]> Place hold on Burrowing mayflies of our larger lakes and streams.

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