Links to Doctrines
In case you want information on a particular topic, this are some links to get you there; these should all be in written form.
Adema: Basic Bible Study Series online; 50 Things Received at Salvation; a half dozen online studies (marriage, family, children, etc.).
Griffin: On line topics. I listed these, even though they are audio studies, primarily because they are easy to download and they are reasonably well-organized.
Institute for Creation Research: Topics pertaining to Evolution versus Creationism.
Kukis: Complete Doctrines; a complete list of doctrines as well as discussions of specific topics (this latter list is rather extensive, and is not hyperlinked; you would use this link to find the particular book and verse for further information). PDF version.
McLaughlin: online booklets.
R. B. Thieme Jr.: A list of doctrines and discussions of particular topics found in booklets from T&P. This list of doctrines is incomplete. PDF version.