1. Forest Production Sample chart. Collection: Images from the Rare Book and Manuscript Collections Date: ca. 1960s Format: Image Creator: Whittaker, Robert Harding, 1920-
2. Series of charts and timelines depicting Man's Future. Collection: Images from the Rare Book and Manuscript Collections Date: ca. 1970s Format: Image Creator: Whittaker, Robert Harding, 1920-
3. Chart of the five life kingdoms. Collection: Images from the Rare Book and Manuscript Collections Date: ca. 1970s Format: Image Creator: Whittaker, Robert Harding, 1920-
