Revision of the australasian genera Agraphydrus Regimbart, Chasomogenus Sharp and Helochares Mulsant (Coleoptera: Hydrophilidae)Watts, C H SWATTS, C.H.S. 1995: Revision of the Australasian genera Agraphydrus Regimbart, Chasmogenus Sharp, and Helochares Mulsant (Coleo...