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  1. NLM Digital Collections - Index-catalogue of the Library of the Surgeon-General's Office, United States Army. Authors ... 
    Publication: Washington : G.P.O., 1880-1932
    resource.nlm.nih.gov/8104689X43
    ... 1909, 4. s., xxix, 604-610. -----. Further note on Grindelia camporum grown in Jer- sey. Ibid., 1910, 4. s., xxxi, 388.—Power (F. B.) Chemical examination of grindelia. Proc. Am. Pharm. Ass., Bait., 1905, liii, 192- ...
  2. NLM Digital Collections - Report on the flora of western and southern Texas 
    Publication: Washington, D.C. : [publisher not identified], 1885
    resource.nlm.nih.gov/101185212
    ... yielding by expression a fair quality of oil. Grindelia squarrosa, Dunal. (Gum Plant.) Common on prairies west ... Anhalonium fissuratum; Cucurbita perennis; Krameria canescens, lanceolata, parvifolia; Grindelia squarrosa; Parthenium hys- terophorus ; Eymenatherum gnaphaliopsis; Chrysactinia Mexicana; ...