General references
  • Altschul, S. von R. 1977. Exploring the herbarium. Scientific American 236: 96--104.

  • Gibbons, B. 1990. The plant hunters: a portrait of the Missouri Botanical Garden. National Geographic 178: 125--140.

  • Holmgren, P. K., and N. H. Holmgren. 1998 [continuously updated]. Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden's Virtual Herbarium. http://sweetgum.nybg.org/ih/

  • Holmgren, P.K., N.H. Holmgren and Lisa C. Barnett. 1990. Index herbariorum. New York Botanical Garden. Bronx, New York.

  • Tozer, E. 1986. Growing a new world in New York's garden. Exxon USA25: 26--31.

  • Watkins, T.H. 1996. Sir Joseph Banks: the greening of the empire. National Geographic 190: 28--53.