Nelson, Gail K.; Richardson, John V. (1986-01-01). "Adelaide hasse and the early history of the U.S. Superintendent of Documents classification scheme". Government Publications Review. Special Issue Bernard M. Fry Festschrift. 13 (1): 79–96. doi:10.1016/0277-9390(86)90030-0. ISSN0277-9390.
Nelson, G.K.; Richardson, John V. Jr. (1986). "Adelaide Hasse and the early history of the U.S. superintendent of documents classification scheme". Government Publications Review. 13: 82. doi:10.1016/0277-9390(86)90030-0.
Nelson, G.K.; Richardson, John V. Jr. (1986). "Adelaide Hasse and the early history of the U.S. superintendent of documents classification scheme". Government Publications Review. 13: 92. doi:10.1016/0277-9390(86)90030-0.
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Nelson, Gail K.; Richardson, John V. (1986-01-01). "Adelaide hasse and the early history of the U.S. Superintendent of Documents classification scheme". Government Publications Review. Special Issue Bernard M. Fry Festschrift. 13 (1): 79–96. doi:10.1016/0277-9390(86)90030-0. ISSN0277-9390.