Directory of Zoological Taxonomists of the WorldBlackwelder, Ruth M, Blackwelder, Richard E · First published 2018Open the Tome
Fifth supplement, 1939 to 1947 (inclusive) to the Leng catalogue of coleoptera of America, north of MexicoRichard E. Blackwelder, Ruth M. Blackwelder, Charles William Leng · First published 1948Open the Tome
