1
Published 1991
Map
3
Published 1990
(CARLI) (Other Sources: (ISLdb)663732)
Map
6
Published 1992
Map
9
Published 1993
Book
10
Published 1993
Software / Computer File CD-ROM
11
Published 1994
Map
13
15
Published 1994
Map
16
Published 1989
Map
17
Published 1993
Map
18
Published 1991
(CARLI) (Other Sources: (ISLdb)603656, (NIUdb)985097)
Map
20