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By "Nielsen, Jørgen G. "
Guide to the identification of genera of the fish order ophidiiformes with a tentative classification of the order /
By: Cohen, Daniel M. - Nielsen, Jørgen G. - United States.
Publication info: [Seattle, Wash.] :National Oceanic and Atmospheric Administration, National Marine Fisheries Service,1978.
Contributed by: Penn State University (archive.org)