J. Whittaker
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J. Whittaker,
A. Theunissen,
Anton Theunissen,
1987
.
J. Whittaker,
Norbert Schnadt,
1995
.
G. Barr,
J. Whittaker,
1989
.
J. Whittaker,
1985
.
J. Whittaker,
1987
.
J. Whittaker,
2016
.
J. Whittaker,
2011
.
S. Bradley,
J. Whittaker,
2000
.
J. Whittaker,
2001
.
J. Whittaker,
2011
.
J. Whittaker,
Norbert Schnadt,
1993
.