The following is a list of all the magazines that are covered by the General Fiction Index for which it is believed that the information is (or might be) incomplete.
| Adventure (Canada) | Missing: all except v105 #4, January 1942; v108 #2, October 1942; v108 #31, June 1945 |
| Argosy (US) | Missing: v11 #15, #431, March 7, 1891; v387 #2, April 1978 |
| Argosy (Canada) | Missing: all except v236 #3, February 25, 1933; v315 #3, June 1943; v316 #1, August 1943; v315 #6, September 1943; v316 #3, December 1943; v317 #16, November 1945 |
| Best Stories | Missing: v3 #2, July 1926 |
| The Black Cat (US) | Missing: v26 # 1, 10 January 1922; v26 # 3, 10 February 1922; v26 #7, 10 April 1922 – v27 #1, July 1922; v27 #3, September 1922; December 1922; |
| Clever Stories | Missing: all issues except #16, 1918? |
| Clever Truths | Missing: v1 #3, August 1925 |
| Co-Ed Campus Comedy | Missing: v1 #1, September 1924; v1 #3, November 1924; v1 #5, January 1925 |
| College Stories [1920s] | Missing: v1 #1, 1926; v1 #2, Fall 1926; v2 #3, November 1927; v2 #4, December 1927; v3 #2, February 1928; v3 #3, March 1928 |
| Complete Stories (Canada) | Missing: all issues |
| The Fiction Magazine [1943] | Missing: all issues |
| The Golden Book Magazine (UK) | Missing: v1 #1, August 1927; v1 #2, September 1927; v1 #3, October 1927; v1 #4, November 1927; v1 #5, December 1927; v1 #6, January 1928 |
| The Green Book Album/Magazine | Missing: v1 #6, June 1909 |
| Green Book Quarterly | Missing: #1, March 1933; #2, May 1933 |
| Laughter | Missing: v1 #2, November 1925 to v2 #4, July 1926; v4 #1, April 1927; v4 #4, July 1927 to v4 #6, September 1927; v5 #2, November 1927 to v5 #5, March 1928 |
| Little Story Magazine | Missing: all except v3 #2, July 1920 & v4 #5, May 1921 |
| Live Stories | sample issues only |
| Miss 1929/1930 | Missing: all except v1 #1, Apr-1929 |
| Modern Stories [1934] | Missing: v1 #1, August 1934; v1#2, September 1934; v1#3, October 1934; any after v1 #5, December 1934 |
| Munsey's Magazine (UK) | Missing: all issues |
| National Novels Monthly | Missing: all issues |
| New Story Magazine | Missing: v11 #1, November 1915 |
| The Popular Complete Stories (Canada) | Missing: all issues |
| Prize Story Magazine | Missing: v3 #4, November 1929; v3 #5, December 1929 |
| Railroad Stories (Canada) | Missing: all issues |
| The Reader's Library | Missing: v1 #1, April 1932; v1 #2, July 1932 |
| The Red Book | incomplete after 1950 |
| Screen Novel Quarterly | Missing: all issues |
| Sensational Startling Stories | Missing: any after v1 #1, March 1927 |
| Sensational Stories | Missing: all issues |
| Short Stories (Australia) | sample issues only |
| Short Stories (Canada) | sample issues only |
| Short Stories (UK) | incomplete |
| Story Digest | Missing: v1 #1, June 1946; v1 #3, September 1946; v1 #4, October 1946; v1 #5, November 1946; v1 #6, January 1947 |
| Street & Smith's Complete Magazine (Canada) | Missing: all issues |
| Street & Smith's Complete Stories (Canada) | Missing: all issues |
| The Thriller [1916] | Missing: all except #4, 1917 |
| The 20 Story Magazine | Missing: February 1929; May 1929; June 1929 |
| The World's Greatest Stories | Missing: v1 #4, May 1929; v1 #5, June 1929; v1 #6, July 1929 |
| Zest [1925] | Missing: all except v1 #1, October 1926 & v2 #1, January 1927 |