a request for information and sources on theory (ies) of perception, causation and explaination

[Anil Gupta]

Dear Friends

I will be grateful for some help in understanding various theories
explainaing the concept of perception,
causality and explaination in Indian and Other Traditions in comparative
sense.

In Sankhya I remember having read about several attributes of  a phenomenon
for exlaining its essence such as Guna, Karma , Prakar, swabhav etc.,

Pl forgive my ingorance. Is Sankhya Yoga available on inetrnet sites? What
else shoudl one read on thsi subject.

Thanks

anil K Gupta

IIM A and SRISTI
anilg at iimahd.ernet.in
http://csf.colorado.edu/sristi