It is assumed that the reader has a basic familiarity with REDUCE 3.5, and also of tensor analysis in general. The REDUCE Users Manual (Hearn 1987), or the books by Rayna (1987) and MacCallum and Wright (1991) are good references for REDUCE. Books by Stephani (19??) and Adler, Basin & Shiffler (19??) are good introductory texts in tensor analysis and cosmology.