Charles Porter G.. A Theological Education by Extension workbook which presents the important points of each book of the New Testament and emphasizes the unity which exists between the books.

Charles Porter G.. Theological Education by Extension workbooks which present the important points of each book of the Old Testament and emphasizes the unity which exists between the books.

Otis Pinkston J.. A brief Theological Education by Extension workbook which covers the rules of interpretation which should be applied when studying the Bible in order to arrive at a correct interpretation.

Donald Bond y Vivian de Bond. This Theological Education by Extension workbook teaches the biblical concepts that should guide a Christian family and are the basis of a happy family.

Charles Porter G.. This Theological Education by Extension workbook helps Christians understand the reasons why we should defeat the world, the flesh and the Devil; and what the Lord has provided to defeat those enemies,