Newsletters In Print, 12th Edition: 2000
Newsletters In Print, 12th Edition: 2000. Jeff Sumner, editor.
Published by The Gale Group, 1999.

This 1276 page, single-volume hardbound directory covers more than
11,200 newsletters, included based on criteria given right up front:
they are published serially, in the US and Canada, available to the
public, of a national or broad regional interest, and tend to treat
specialized interests and topics.

The book is divided into a sections as follows:

Descriptive listings of the newsletters, three columns to a page, with
each listing numbered and taking up about two column inches of space.
The listings include contact information, information on who the
editors are, a description of the newsletter of a couple of sentences,
notes on illustrations, audience, size, date started, frequency of
publication, circulation, price, ISSN (where available). This section
is itself divided into 33 sections by subject areas, which themselves
are grouped into seven broad categories: Business and Industry, Family
and Everyday Life, Information and Communications, Agriculture and Life
Sciences, Community and World Affairs, Science and Technology, and
Liberal Arts.

Following those descriptions are the indexes.

The first index is for Online Newsletters. (That section is hopelessly
out of date.) Following that is the index of Free Newsletters. Then
the Index to Newsletters with Advertising, useful if you want to
advertise something to a specialized readership. Then there are the
Publisher Index, the Subject Index, and the Title and Keyword Index.

This is a great resource with the one major weakness that it covers an
area of information that changes so quickly it's difficult to keep up
with in a resource that's only updated every few years.