"2023-02-23"^^ . "2023-02-23"^^ . "AX 558, Herbert Spencer Zim and Sonia Bleeker papers, 1934-1976. Collection in Special Collections University Archives, University of Oregon."@en . "Herbert Spencer Zim (1909-1994) was a teacher and author in the field of science. His works in this collection reflect his work in the science field. Sonia Bleeker Zim was an editor for a publishing house and a writer of youth books. Her work in this collection represents her career as a youth author."@en . "Herbert Spencer Zim and Sonia Bleeker papers, 1934-1976"@en . . .