Malacologische opstellen / W. Backhuys.

by Backhuys, W.
Published 1976

Zoogeography and taxonomy of the land and freshwater molluscs of the Azores / door Willen Backhuys.

by Backhuys, W.
Published 1975

Der elevations-effekt bei einigen alpenpflanzen der schweiz [by] W. Backhuys.

by Backhuys, W.
Published 1968

Tabulae ineditae : molluscorum insularum canariensium / R.J. Shuttleworth ; W. Backhuys, ed.

by Shuttleworth, R. J. 1810-1874.
Published 1975

De landslakken van Nederland / door E. Gittenberger, W. Backhuys, Th. E.J. Ripken.

by Gittenberger, E.
Published 1970