Biodiversity Heritage Library
By "Ravn, J.P.J. (Jesper Peter Johansen), 1866-"
On Jurassic and Cretaceous fossils from north-east Greenland / by J.P.J. Ravn.
By: Ravn, J.P.J. (Jesper Peter Johansen),
Publication info: Copenhagen :Printed by Bianco Luno,1911.
Contributed by: University of Toronto - Gerstein Science Information Centre