21
24
by Kopecká, Pavla
Published 1999
Thesis Manuscript
27
by Sagrera, Martín, 1935-
Published 1990
Book
28
by Nordskog, John Eric
Published 1960
Book
29
by Nam, Charles B.
Published 1988
Book
31
Published 1998
Book
32
Published 1999
Book
34
by Cipolla, Carlo M., 1922-2000
Published 1972
Book
36
38
Published 1997
Book
39
Published 1998
Book