This site provides a very clear exposition of the Documentary or Graf-Wellhausen Hypothesis, which is also represented here diagrammatically. A table illustrates differences between the four documentary sources or traditions (J, E, P, and D), whilst a link is available to an example of the application of the Hypothesis to the Biblical text, specifically to the story of the flood.

This hypothesis refers to the view that the Torah, or first five books of the Bible, was compiled from four different sources rather from a single hand, traditionally Moses. This site provides a brief history of the development of this hypothesis based upon Richard Elliot Friedman's book Who Wrote the Bible?

An abstract from John Barton 'Source Criticism', The Anchor Bible Dictionary. The Documentary Hypothesis as an example of source criticism is discussed here in four main sections: A. Definitions; C. Evidence for Composite Character; D. Stages of Source Critical Analysis; and E. Terminology. This essay describes the reasoning behind the Hypothesis and accepts but does not consider the validity of its conclusions.

This page is divided into four sections covering the history of the Hypothesis, its identification of the authors and editor (R) of the Pentateuch, its explanation of the evolution of the latter, and finally its misuse, specifically by the Nazis. This site also provides a copy of the first ten chapters of Genesis that identifies by way of different coloured text the writers J, P, and R. Among the references is a link to Ken Collin's article 'Torah in Modern Scholarship', which argues that the Documentary Hypothesis is invalid.