Jarvik, E. (1972). Middle and upper devonian porolepiformes from East Greenland with special reference to Glyptolepis groenlandica N. Sp: And a discussion on the structure of the head in the porolepiformes. Reitzel.
Chicago Style (17th ed.) CitationJarvik, Erik. Middle and Upper Devonian Porolepiformes from East Greenland with Special Reference to Glyptolepis Groenlandica N. Sp: And a Discussion on the Structure of the Head in the Porolepiformes. København: Reitzel, 1972.
MLA (9th ed.) CitationJarvik, Erik. Middle and Upper Devonian Porolepiformes from East Greenland with Special Reference to Glyptolepis Groenlandica N. Sp: And a Discussion on the Structure of the Head in the Porolepiformes. Reitzel, 1972.
Warning: These citations may not always be 100% accurate.