1
Published 1971
Journal / Magazine
2
Published 1976
Journal / Magazine
3
by Proctor, Samuel D.
Published 1988
Book
4
Published 1987
Journal / Magazine
5
Published 2001
Journal / Magazine
6
by Brakelmann, Günter.
Published 1981
Book
7
by Oxnam, G. Bromley 1891-1963
Published 1971
Book
8
Published 1986
Journal / Magazine Microform
9
by Stringfellow, William.
Published 1994
Book
10
Published 1984
Book
11
Published 2015
Book