Where I can get the source code for a computer code "POROUS", which is
designed to solve compressional wave propagation in saturated porous
media?

I found this code was mentioned in a journal paper:
Compressional waves in fluid-saturated elastic porous media  by S.K.
Garg, Adnan H. Nayfeh, and A. J. Good 1974 Journal of applied physics
Vol.45 No. 5

The details of the "POROUS" code should be in this publication
(according to the reference list of the above paper):
"T.D. Riney, G.A. Frazier, S.K. Garg, A.J. Good, R.G.Herrmann, L.W.
Morland, J.W.Pritchett, M.H. Rice, J.Sweet, Systems, science and
software Report No. SSS
73-1490, 1973 (unpublished).   "

where I can find the details of the "POROUS" code? Thanks