By Shafer, David A.
By Mantel Jr., Samuel J., Meredith, Jack R., Shafer, Scott M., Sutton, Margaret M.
By Shafer, D. Brian
By Shafer, Byron E., Claggett, William J.M.
By Meredith, Jack R., Mantel Jr., Samuel J., Shafer, Scott M., Sutton, Margaret M.
By Kenen, Peter, Shafer, Jeffrey R., Wicks, Nigel L., Wyplosz, Charles
By Shafer, William G., etc.
By Meredith, Jack R., Shafer, Scott M.
By Shafer, Byron E.