References:

Condie, KC (Ed). Archean Crustal Evolution . Elsevier, New york. 1994.

Condie KC (ED). Proterozoic Crustal Evolution. . Elsevier, New York. 1994.

Hunter D.R. (Ed) . Precambrian of the Southern Hemisphere . Elsevier, New York. 1994

Crustal Evolution of Southern Africa. Springer-Verlag, New York, 1982