1
Published 1974
Book
2
Published 1978
Book
3
Published 1878
Journal / Magazine
4
Published 1986
Journal / Magazine
5
by Breck, Robert L.
Published 1862
Book
6
Published 1983
Book
7
Published 1993
Journal / Magazine
8
by Norton, Herman Albert.
Published 1977
Book
9
Published 1941
Book
11
Published 2006
Textual Material Electronic
12
Published 1981
Book
13
14
Published 1980
Book
15
Published 1980
Book
16
Published 1932
Journal / Magazine
17
Published 1975
Book
18
Published 1979
Book
19
Published 1961
Book
20
Published 1978
Book