Editore: Bulletin of the Geological Institution of the University of Upsala, Vol. IX, 1908-1909 (1910), pp. 171-182 + 1 folded map., 1910
Da: Eryops Books, Stephenville, TX, U.S.A.
Disbound from journal; no covers; minor shelfwear w/ light creasing of corners of leaves; o/w in good condition.