Twelve new Hydrochus-species from South America (Coleoptera: Hydrophilidae). Phegea, 20(2) 1992: 95-103. 99 [Zoological Record Volume 129]
Twelve new Hydrochus-species from South America (Coleoptera: Hydrophilidae). Phegea, 20(2), 1 juni 1992: 95-103. 99 [Zoological Record Volume 133]