H. L. A. Hart/ John Gardner (INT)
(2)
Fiona Gardner (EDT)/ Steven J. Coombs (EDT)/ John McLeod (FRW)/ Rom Harre (INT)
(1)
John Champlin Gardner/ William H. Gass (INT)
(1)
John Gardner (INT)/ Fritz Kredel (CON)
(1)
John Gardner/ Charles Johnson (INT)
(1)
John Gardner/ Charles Johnson (INT)/ Stewart O'Nan (EDT)
(1)
L. Frank Baum/ John R. Neill (ILT)/ Martin Gardner (INT)
(1)