Rare-earth mineral deposits of the Mountain Pass district, San Bernardino County, California, by J.C. Olson ... [et al.] with a foreword on History of the discovery at Mountain Pass, California, by D.F. Hewett.
Bound With: Pleistocene geology of eastern South Dakota. -- Floras of the Pocono formation and Price sandstone in parts of Pennsylvania, Maryland, West Virginia, and Virginia,