1
by Einstein, Albert
Published 1933
Book
2
by Rovira, Alejandro
Published 1982
Book
3
Journal
4
by Tello, Angel Pablo
Published 1987
Book
5
by Klare, Michael
Published 1970
Book
6
by Alberdi, Juan Bautista
Published 1947
Book
7
by Ríos, Alberto
Published 1946
Book
8
Journal
9
Journal
10
Journal
12
by Milia, Juan Guillermo
Published 1980
Book
13
Published 1987
Book
14
Published 1980
Book
15
Journal
16
Journal
17
Published 1985
Book
18
Published 1980
Book
19
Published 1980
Book
20
Published 1980
Book