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  1. By: Wright, Charles, - Johnston, I. M.
    Publication info: 1940.
    Holding Institution: Harvard University Botany Libraries
    Subjects: Chihuahua (State)  Mexico  Plants  Sonora (State)  Southwest, New
  2. By: Barber, Charles M. (Charles Melvin), - Canby, William Marriott, - Combs, Robert, - Conzatti, Cassiano, - Deam, Charles Clemon, - Goldman, Edward Alphonso, - González, Valentín, - Harshberger, John W. (John William), - Holway, E. W. D. (Edward Willet Dorland), - Nelson, Edward William, - Palmer, Edward, - Seler, Eduard, - Seler-Sachs, Caecilie, - Townsend, C. H. T. (Charles Henry Tyler), - Harvard University. Gray Herbarium.
    Holding Institution: Harvard University Botany Libraries
    Subjects: Brazil  Central America  Chihuahua (State)  Compositae  Cuba  Gray Herbarium  Guatemala  Harvard University  Mexico  Plants  Tepic
    BHL Collections: BHL Field Notes Project
  3. By: Wright, Charles,
    Holding Institution: Harvard University Botany Libraries
    Subjects: Chihuahua (State)  Coahuila (State)  Mexico  New Mexico  Plants  Texas