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Bengtsson, Simon 
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Berner, Lewis 
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Billberg, Gustav J. 
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1949. New species of Ephemerella from Illinois (Ephemeroptera). Can. Ent. 79:232-6. 
7 figs. (Publication dated 1947.) 
Burmeister, H. C. C. 
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Campion, Herbert 
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