By Sadava, David, Heller, H.Craig, Orians, Gordon H., Purves, William K., Hillis, David M.
By Purves, William K., Sadava, David E., Orians, Gordon H., Heller, H.Craig
By Purves, John, Reiner, Martin
By Heiney, Paul, Purves, Libby
By Purves, Pamela
