Editore: Yorkshire Geological Society, 1985
Da: Eryops Books, Stephenville, TX, U.S.A.
No Binding. Condizione: Very Good. ORIGINAL 1985 Article, disbound from journal; no covers; in very good condition. Journal.
Editore: The Palaeontological Association, 1989
Da: Eryops Books, Stephenville, TX, U.S.A.
No Binding. Condizione: Very Good. ORIGINAL 1989 Article, disbound from journal; no covers; in very good condition. Journal.