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  1. 1
    Published 1989
    New Delhi : Dept. of Science & Technology, [1989]
    65 p. in various pagings ; 28 cm.
  2. 2
    Published 1988
    New Delhi, India : UNESCO-UNEP International Environmental Education Programme, 1988.
    327 p. : ill. ; 25 cm.
  3. 3
    Santiago : Sociedad Científica de Chile.
    45 v. ; 27 cm.
  4. 4
    Published 1911
    [London] : National Food Reform Association, [1911?]
    viii, 103 pages.
  5. 5
    Published 1900
    New York : Tiffany and Co., 1900.
    16 unnumbered pages ; 20 cm.
  6. 6
    10 pages, 8 unnumbered pages : illustrations

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