Hinton, Howard Everest (1939). An inquiry into the natural classification of some families of beetles, and a monographic revision of the Mexican water beetles of the family Elmidae (PhD thesis). University of Cambridge. OCLC885435434. EThOSuk.bl.ethos.604087.
Hinton, Howard Everest (1939). An inquiry into the natural classification of some families of beetles, and a monographic revision of the Mexican water beetles of the family Elmidae (PhD thesis). University of Cambridge. OCLC885435434. EThOSuk.bl.ethos.604087.