Libraries & Archives:
American Museum of Natural History Library
Biosciences & Natural Resources Library
Bodleian Library, Oxford, England
British Library, London, England
Cabot Science Library, Harvard University
California Academy of Sciences Library
Cornell University Library, Division of Rare & Manuscript Collections
Illinois Natural History Survey Library
Library of Congress, USA
Life Science Library
National Oceanic & Atmospheric Administration, Central Library
New York Botanical Gardens Library
Royal Ontario Museum, Libraries & Information Center
San Francisco Public Library, San Francisco, California
Scripps Institute of Oceanography Library
United States Geological Survey Library
Vatican Library, texts on botany & natural history