By Gross, Richard D., Humphreys, Paul
By Gross, Richard D.
By Andersen, PER KRAGH, Borgan, Ornulf, Gill, Richard D., Keiding, Niels
By Chew, Samuel C., Altick, Richard D.
By Gross, Richard D., Richard D. Gross
By De Veaux, Richard D., Velleman, Paul F., Bock, David E.