Commentary on Revelation.
The outlines are based on in part by outlines created by Dr. Vern Poythress in class notes from Westminister Theological Seminary in the late 1970s. An updated version of his outlines is available at http://campus.wts.edu/~vpoythress/nt311/nt311.html, and is available under the GNU Free Documentation License, which permits redistribution with modification as long as credit is given and others are also free to modify.