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
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37	August 1965
38			Now named Ergo Sum
39	February 1966
40
41			Tricon issue

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Publication

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