A rubber plant survey of western North America
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb. Chrysothamnus nauseosus and its varieties, by H. M. Hall.--Chrysil, a new rubber from Chrysothamnus nauscosus, by H. M. Hall and T. H. Goodspeed.--The occurrence of rubber in certain west Ameican shrubs, by H. M. Hall and T. H. Goodspeed
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