Author: Voort, J. van der (et al.), 2021.:
Title: In memoriam: Adrianus Willem (Arie W.) Janssen (1937-2021).
Description: Cainoz. Res., 21(2): pp. 113-146, 14 illustr. refs., full bibliogr., list of eponyms, list of described taxa. 4to. Plain new wrappers. Fine.

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