1
by Bagenal, Timothy
Published 1990
2
by Peccei, Aurelio
Published 1977
3
Published 1987
4
by Lesikar, Raymond V.
Published 1981
5
by Jamsa, Kris
Published 1989
6
by Heddergot, Karl-Heinz
Published 1983
7
by Scharf, Peter
Published 1984
8
by Reid, William Arbuckle
Published 1978
9
by Babbie, Earl
Published 1990
10
Published 1989
11
Published 1990
12
by Goodman, Michael B.
Published 1984
13
by Gilbert, Alan
Published 1981
14
by Baker, Thornton
Published 1983
15
by Schueller, Wolfgang
Published 1977
16
by Reeves, Elton T.
Published 1979
17
Published 1993
18
Published 1980
19
by Moor, Nigel
Published 1983
20
by Ireland, Thomas R.
Published 1982