Slater, Robert H. and John: letters, reader's report
Canadian Speakers' and Writers' Service Ltd.
1968
https://atom.library.yorku.ca//slater-robert-h-and-john-letters-readers-report
1984-006/003(13)
https://atom.library.yorku.ca//york-university-archives-special-collections
York University Archives & Special Collections (CTASC)