by Friedman, M., Perkins, R.D., Green, S.J.
Published in International journal of rock mechanics and mining sciences & geomechanics abstracts (01.01.1970)

by Perkins, R.D., Green, S.J., Friedman, M.
Published in International journal of rock mechanics and mining sciences & geomechanics abstracts (01.09.1970)

by Perkins, R.D., Green, S.J., Friedman, M.
Published in International journal of rock mechanics and mining sciences & geomechanics abstracts (1970)

by Perkins, R.D, McKenzie, M.D, Blackwelder, P.L
Published in Science (1972)

by Perkins, R.D, Halsey, S.D
Published in Journal of sedimentary petrology (01.09.1971)

by Bailey, A. S., Ledger, A. P., Perkins, N. R. D.
Published in Journal of the Chemical Society. C. Organic (1967)