Campbell, Taylor R.; Hanson, Chris; Gleckler, Arthur A. Index: mit-scheme.git. MIT/GNU Scheme. GNU Savannah. 24 July 2021 [24 July 2021]. (原始内容存档于2019-01-30).
web.archive.org
Campbell, Taylor R.; Hanson, Chris; Gleckler, Arthur A. Index: mit-scheme.git. MIT/GNU Scheme. GNU Savannah. 24 July 2021 [24 July 2021]. (原始内容存档于2019-01-30).