1
Journal / Magazine
2
by Hougen, Virgil C.
Published 1954
Book
4
Published 1963
Book
5
Published 1951
Journal / Magazine
7
Published 1953
Book
10
Published 1944
Book
13
Published 1948
Book
16
Published 1962
Book
17
Published 1949
Journal / Magazine
18
Published 1949
Journal / Magazine
19
Published 1953
Book
20
by Krebs, Ervin E.
Published 1951
Book