BioStor
 | Scarab beetles of the genus Onthophagus North of Mexico H Howden (1963) Proceedings of the United States National Museum 114(3467): 1-135 |
 | Species Composition And Seasonal Abundance Of Carrion Beetles In An Oak beech Forest In The Great swamp-National wildlife-Refuge (Nj) P P Shubeck, N M Downie et al. (1981) Entomological News 92: 7-16 |