Olsen 1991 pp 1-10
Olsen 1991 pp 11-25
Olsen 1991 pp 26-37
Bourman et al 1999 (3MB)
Salt Lakes 2000
Bourman and Harvey 1983
Harvey 1988
Bourman and Barnett 1995
Barnett 1995
Harvey 1996 (2.9 MB)
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