1955 126 p., 28 planches couleurs hors-texte, 41 figures in-texte. petit 4°, cartonnage éditeur avec jaquette. Très bon état, jaquette légèrement salie.
1987 74 p., numerousf figures, 6 (4 coloured) plates, paperbound. Library stamps and removed sticker mark on title-page.
1998 xii, 383 p., numerous figures, 4to, hardbound. Library stamps, else very good copy.
1860 248 (= 137-384), 112 (17-128) p., paperbound (in blue modern plain covers + extra pastic covers). Title-page is lacking, else complete text which was issued in two volumes.
1973 viii, 55, [8] p., 18 plates, 4to, paperbound (printed one-sided). Scarce.
1924 145 p., 10 figs, 1 plate, paperbound. Library stamps.
1930 Illinois Biological Monographs, 2(1), 1930 : in-8, broché 2° revised édition, 161 pp., 10 planches N&B, couverture bleue imprimée. Très bon état, non rogné, quelques rousseurs !
1970 524 p., num. figs, paperbound. Library stamps.
1984 128 p., 8 figures, paperbound. Library stamps.
1939 118 p., several graphs & tables, paperbound. Some annotations. Library stamps.
1927 90 p., 2 pls, paperbound. Thesis. Library stamps.
1953-1962 including his thesis ''Levenswijze en bestrijding van de Bonekever (Acanthoscelides obtectus).
Non Renseigné. 1975-1977. In-8. En feuillets. Bon état, Couv. convenable, Dos satisfaisant, Intérieur frais. Tiré à part de la page 219-231. . . . Classification Dewey : 595.7-Entomologie
En allemand Classification Dewey : 595.7-Entomologie
1990 57 p., paperbound. Library stamps, else very good copy.
1982 370 p., 4to, paperbound. This first part deals with Symphyta, and Apocrita (in part, Apoidea to Scolioidea, Mutilidae and Tiphiidae). A clean copy.
1986 393 p., 343 figures, 4 maps, 4to, paperbound. Library stamps, else good copy.
1963 93 p., 7 plates depicting 76 figures, paperbound (no covers). Stuttgarter Beiträge zur Naturkunde. Library stamp.
1983 68 p., 162 figures, paperbound. Library stamps, else good copy.
1985 74 p., 189 figures, printed wrappers. Library stamps, else good copy.
1953 vii, 224 p., numerous text figures, frontispiece, turqoise cloth with gilt title on spine. Important study on the black flies, a notorious group of biting flies of bloodsuckers and vectors of parasitic organisms such as filarial worms. The frontispiece shows a typical Simulium breeding-place. Former owner's name on front flyleaf.
1989 [6], 212 p., 217 figures, 8 plates, 1 map, coloured frontispiece, cloth. Library stamps else a very good copy.
1990 140 p., 52 figures, 14 coloured plates, 57 distribution maps, several portraits, coloured frontispiece, 4to, hardbound (dust jacket). Library stamps, else good copy.
1987 708 p., 375 figures, 50 coloured plates, 330 distribution maps, several portraits, coloured frontispiece, 4to, hardbound (dust jacket). Library stamps, else good copy.