Beside the POV-Ray material mentioned in "Books, Magazines and CD-ROMs" there are several good books or periodicals that you should be able to locate in your local computer book store or your local university library.
"An Introduction to Ray tracing" Andrew S. Glassner (editor) ISBN 0-12-286160-4; Academic Press 1989
"3D Artist" Newsletter, "The Only Newsletter about Affordable PC 3D Tools and Techniques") Publisher: Bill Allen; P.O. Box 4787; Santa Fe, NM 87502-4787; (505) 982-3532
"Image Synthesis: Theory and Practice" Nadia Magnenat-Thalman and Daniel Thalmann; Springer-Verlag; 1987
"The RenderMan Companion" Steve Upstill; Addison Wesley; 1989
"Graphics Gems" Andrew S. Glassner (editor); Academic Press; 1990
"Fundamentals of Interactive Computer Graphics" J. D. Foley and A. Van Dam; ISBN 0-201-14468-9; Addison-Wesley 1983
"Computer Graphics: Principles and Practice (2nd Ed.)" J. D. Foley, A. van Dam, J. F. Hughes; ISBN 0-201-12110-7; Addison-Wesley, 1990
"Computers, Pattern, Chaos, and Beauty" Clifford Pickover; St. Martin's Press; "SIGGRAPH Conference Proceedings"; Association for Computing Machinery Special Interest Group on Computer Graphics
"IEEE Computer Graphics and Applications"; The Computer Society; 10662, Los Vaqueros Circle; Los Alamitos, CA 90720
"The CRC Handbook of Mathematical Curves and Surfaces" David von Seggern; CRC Press; 1990
"The CRC Handbook of Standard Mathematical Tables" CRC Press