1. 1
    by Backer, John H., 1902-
    Published 1971
    ...HC 286.5 .B126...
    Book
  2. 2
    by Della Porta, Donatella, 1956-
    Published 1995
    ...HN 490 .V5 .D357...
    Book
  3. 3
    by Hughes, Michael L.
    Published 1999
    ...HJ 4133 .G3 .H894 1999...
    Book