12181
12182
Published in 1982
Repository
12183
Published in 1974
Repository
12184
Published in 1978
Repository
12185
by Mazón, Nelson; Peralta I., Eduardo; Murillo I., Angel; Falconí-Castillo, Esteban; Monar B., Carlos; Subía G., Cristian; Estrella Sandoval, Ana Paola; Pinzón Z., José
Published in 2007
Repository
12186
12187
12188
Published in 1999
Repository
12189
12190
12191
12192
12193
Published in 1982
Repository
12194
12195
12196
12197
12198
12199
12200