1
Cyhoeddwyd: 1998
Superior document: University of California publications in geological sciences 142
2
Cyhoeddwyd: 1998
Superior document: University of California publications in geological sciences 143
3
Cyhoeddwyd: 1995
Superior document: University of California publications in geological sciences 139
4
Cyhoeddwyd: 1991
Superior document: University of California publications in geological sciences 135
5
Cyhoeddwyd: 1985
Superior document: University of California publications in geological sciences 129
6
Cyhoeddwyd: 1987
Superior document: University of California publications in geological sciences 130
7
Cyhoeddwyd: 1992
Superior document: University of California publications in geological sciences 137