1
2
3
4
5
6
7
Published 1994
“...Gale Research Inc....”
Serial
8
9
10
11
12
Published 1997
“...Gale Research Inc....”
Serial
13
14
Published 1998
“...Gale Research Inc....”
Book
15
16
17
18
Published 1995
“...Gale Research Inc....”
Serial
19
20
Published 1990
“...Gale Research Inc....”
Serial