Differential

A fanzine published by Paul Wyszkowski of Ottawa, Canada. The last few issues were named Ergo Sum.

Issue Date Pages Notes
1 July 1962
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37 August 1965
38 Now named Ergo Sum
39 February 1966
40
41 Tricon issue

This is a Stub Fanzine page. Please extend it by adding information about when and by whom it was published, how many issues it has had, (including adding a partial or complete checklist), its contents (including perhaps a ToC listing), its size and repro method, regular columnists, its impact on fandom, or by adding scans or links to scans.