Scolecodonts from the Trenton series (Ordovician) of Ontario, Quebec and New YorkPublished in Annals of The Carnegie Museum, in 1945, in volume 30, pages 119-212The bird of habitat bird groupsPublished in Annals of the Carnegie Museum, in 1945, in volume 30, issue 11, pages 97-118
The bird of habitat bird groupsPublished in Annals of the Carnegie Museum, in 1945, in volume 30, issue 11, pages 97-118