Duffels, Joannes Petrus (1939-)

A revision of the genus Diceropyga Stål, 1870 (Homoptera, Cicadidae) / [by] J.P. Duffelsschema:ProductModel Catalogue of the Cicadoidea (Homoptera, Auchenorhyncha), 1956-1980 / by J.P. Duffels and P.A. van der Laanschema:ProductModel List of collecting stations of an excursion in Fiji from 15.I.1979 - 30.III.1979 / by J.P. and M.J. Duffelsschema:ProductModel The Cicadas of the Fiji, Samoa and Tonga Islands, their taxonomy and biogeography (Homoptera, Cicadoidea) / by J.P. Duffels ; with a chapter on the geological history of the area by A. Ewartschema:ProductModel

Zwerftocht door het insektenrijk / Walter Linsenmaier ; Ned. ed. onder red. van J.P. Duffels en W.N. Ellis ; [vert. uit het Engels door P.H. van Doesburg ... et al.]schema:ProductModel