THE UPPER CRETACEOUS FLORAS OF ALASKA with A DESCRIPTION OF THE PLANT-BEARING BEDS: PROFESSIONAL PAPER 159
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1930. Soft cover. 116 pages with map and tables, plus 86 photographic plates bound in the rear and folded map in the rear pocket. Bound in original gray stiff paper covers printed in black. Spine and lower portion of the front cover..... More