Author: Klosowscy, G., Klosowscy, S., & Klosowscy, T., 1991.:
Title: Ptaki biebrzankich bagien / The birds of Biebrza's marshes / Die Vögel der Biebrza-Sümpfe.
Description: Warszawa 1991. Square 4to, 26.8cm. Pp. 296, numerous fine photos throughout (partly coloyred, some full-page), Hardbound, orig. boards in pict. lamin. dust-jacket. - Fine. All text in Polish, English, and German, printed in parallell columns.

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