At head of title: Conseil permanent international pour l'exploration de la mer. The series comprises administrative reports (v. 1-2, 4, 6-7, 11-15, 19, 21, 24-26) and special reports v. 3, 5, 8-10, 16-18, 20 22-23 ; the latter deal chiefly with fish and fisheries. Subtitles vary slightly and are in English, French, and German.