21
Published in 1991
Repository
22
23
Published in 1989
Repository
24
Published in 2012
Repository
25
Published in 1994
Repository
26
27
Published in 1989
Repository
28
Published in 1990
Repository
29
Published in 1991
Repository
30
Published in 1994
Repository
31
32
Published in 1986
Repository
33
by Paucar, Betty; Gallegos, Patricio; Nieto C., Carlos; Córdova, Juan J.; Rodríguez I., Luis F.; Ochoa L., José; Williams, Roger
Published in 2000
Repository
34
Published in 1994
Repository
35
Published in 1991
Repository
36
37
38
39
Published in 1988
Repository
40
Published in 1991
Repository