1. Monthly from March 1923 through Dec 1939 with the exception of these
missing months:
   August 1923
   December 1923
   May 1924
   Jun 1924
   August 1924
   September 1924
   October 1924
   March 1931
   April 1931
   June 1931
   August 1936
   June 1939
   Issue numbers: 1-190

2. Bimonthly from January 1940 through September 1954
   Issue numbers: 191-279

3. Four issues appeared in the 1973/74 revival
   Issue numbers: 280-283 

4. Four issues appeared in the 1981/83 revival
   Issue numbers: 284-287

5. Two issues in the 1984/85 revival
   Issue numbers: 288-289

6. George H. Scithers' revival ran from 1988 to Spring 1994 when the
   Weird Tales license was revoked and the 'zine changed its name to
   Worlds of Fantasy and Horror.
   Issue numbers:
   290: Spring 1988
   291: Summer 1988
   292: Fall 1988
   293: Winter 1988/1989
   294: Fall 1989
   295: Winter 1989/1990
   296: Spring 1990
   297: Summer 1990 
   298: Fall 1990
   299: Winter 1990/1991
   300: Spring 1991
   301: Summer 1991
   302: Fall 1991
   303: Winter 1991/1992
   304: Spring 1992
   305: Winter 1992/1993
   306: Spring 1993
   307: Summer 1993
   308: Spring 1994
   309-312 (WoFH kept same numbering): Summer 1994 to Summer 1996)

7. In March 1998, the DNA Publications revival started.  It was bought
   by Wildside Press in 2005.  The numbering began with 313 in Summer
   1998.
   313: Summer 1998
   314: Fall 1998
   315: Spring 1999
   316: Summer 1999
   317: Fall 1999
   318: Winter 1999/2000
   319: Spring 2000
   320: Summer 2000
   321: Fall 2000
   322: Winter 2000/2001
   323: Spring 2001
   324: Summer 2001
   325: Fall 2001
   326: Winter 2001/2002
   327: Spring 2002
   328: Summer 2002
   329: Fall 2002
   330: Winter 2002/2003
   331: Spring 2003
   332: Jul/Aig 2003
   333: Sep/Oct 2003
   334: Jan/Feb 2004
   335: Mar/Apr 2004
   336: Dec 2004
   337: Sep 2005
   338: Feb 2006
   339: Apr 2006
   340: Jun 2006
   341: Aug/Sep 2006
   342: Oct/Nov 2006
   343: Dec 2006 / Jan 2007
   344: Apr/May 2007
   345: Jun/Jul 2007
   346: Sep/Oct 2007