 | The genus Pterodrilus (Annelida: Branchiobdellida) (1968) Proceedings of The United States National Museum 125: 1-44 |
 | New genera and species of branchiobdellid worms (Annelida: CHtellata) P C Holt (1968) Proceedings of The Biological Society of Washington 81: 291-318 |
 | A New Crayfish from the Cumberland river system with notes on Cambarus carolinus (1973) Proc. Biol. Soc. Wash. 86: 41-68 |
 | An Emendation Of The Genus Triannulata With The Assignment Of Triannulata-Montana To Cambarincola Clitellata Branchiobdellida P C Holt (1974) Proceedings of The Biological Society of Washington 87: 57-72 |
 | A gill-inhabiting new genus and species of the Branchiobdellida (Annelida: Clitellata) (1977) Proceedings of The Biological Society of Washington 90: 726-734 |
 | The Reassignment Of Cambarincola elevatus Clitellata Branchiobdellida To The Genus Sathodrilus P C Holt (1978) Proceedings of The Biological Society of Washington 91: 472-483 |
 | A Resume Of Members Of The Genus Cambarincola Annelida Branchiobdellida From Pacific Drainage Of The Usa P C Holt (1981) Proceedings of The Biological Society of Washington 94: 675-695 |
 | New Species Of Sathodrilus Clitellata Branchiobdellida From The Pacific Drainage Of The Usa With The Synonymy Of Sathodrilus-Virgiliae P C Holt (1981) Proceedings of The Biological Society of Washington 94: 848-862 |
 | A New Species Of The Genus Cambarincola Clitellata Branchiobdellida From Illinois Usa With Remarks On The Bursa Of Cambarincola vitreus And The Status Of Sathodrilus P C Holt (1982) Proceedings of The Biological Society of Washington 95: 251-255 |
 | A New Species Of The Genus Cambarincola (Clitellata, Branchiobdellida) From California P C Holt (1984) Proceedings of The Biological Society of Washington 97: 544-549 |
 | On Some Branchiobdellids Annelida Clitellata From Mexico With The Description Of New Species Of The Genera Cambarincola And Oedipodrilus P C Holt (1984) Proceedings of The Biological Society of Washington 97: 35-42 |
 | Newly Established Families Of The Order Branchiobdellida (Annelida, Clitellata) With A Synopsis Of The Genera P C Holt (1986) Proceedings of The Biological Society of Washington 99: 676-702 |
 | On The Identity Of Astacus (Cambarus) Mexicanus Erichson (1846) And Cambarus Aztecus Saussure (1857) (Decapoda, Cambaridae) With The Description Of Procambarus olmecorum, New Species, From Veracruz, Mexico H H Hobbs (1987) Proceedings of The Biological Society of Washington 100: 198-215 |
 | 4 New Species Of Cambarincolids (Clitellata, Branchiobdellida) From The Southeastern United states With A Redescription Of Oedipodrilus macbaini (Holt, 1955) P C Holt (1988) Proceedings of The Biological Society of Washington 101: 794-808 |
 | The Correct Name Of Ceratodrilus orphiorhysis Holt, 1960 (Annelida, Branchiobdellida) P C Holt (1988) Proceedings of The Biological Society of Washington 101: 308-308 |
 | A New Species Of The Cambarincolid Genus Sathodrilus From Missouri, With The Proposal Of A Replacement Name For Adenodrilus Holt, 1977 P C Holt (1989) Proceedings of The Biological Society of Washington 102: 738-741 |
 | A checklist of and illustrated key to the genera and species of the Central and North American Cambarincolidae (Clitellata: Branchiobdellida) P C Holt and B D Opell (1993) Proceedings of The Biological Society of Washington 106: 251-295 |
 | Description Of A New Branchiobdellidan Species, With Observations On Three Other Species, And A Key To The Genus Pterodrilus (Annelida: Clitellata) Geider Sr (1996) Proceedings of The Biological Society of Washington 109: 256-263 |
 | A Review Of The Taxonomic Nomenclature And A Checklist Of The Species Of The Branchiobdellae (Annelida: Clitellata) Gelder Sr (1996) Proceedings of The Biological Society of Washington 109: 653-663 |
 | Description Of A New Species And A Redescription Of Cirrodrilus Aomorensis (Yamaguchi, 1934) With A Detailed Distribution Of The Branchiobdellidans (Annelida : Clitellata) In Northern Honshu, Japan S R Gelder and A Ohtaka (2000) Proceedings of The Biological Society of Washington 113: 633-643 |
 | Redescription And Designation Of Lectotypes Of The North American Cambarincola Okadai Yamaguchi, 1933 (Annelida : Clitellata : Branchiobdellidae) S R Gelder and A Ohtaka (2000) Proceedings of The Biological Society of Washington 113: 1089-1095 |