In the course of creating the index there were several changes or corrections noted that needed to be made in the identification of each issue. Two issues were double issues. Both were called the July-August issue. These double issues appeared in 1983 and 1987. In both cases all articles were listed in the index as being from the July issue of the appropriate year.
A number of other issues were mislabeled in one way or another. The articles in them are all indexed under the correct year and month. The following table identifies those issues and supplies the correct identification.
In addition a number of issues had the wrong number put in the httle coupon on the back page. This error is of no possible interest to anybody but a perfectionist. Nevertheless I put a table of those issues and the correct number here for completeness.