1
Published in 1981
Repository
2
3
Published in 1992
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4
by Viteri D., Pablo; Vásquez C., Wilson; León F., Juan; Viera, William; Poso M., Manuel; Hinojosa, Milton; Revelo, Jorge; Ochoa L., José
Published in 2009
Repository
5
Published in 1999
Repository
6
Published in 2004
Repository
7
8
Published in 2004
Repository
9
Published in 2004
Repository
10
Published in 2004
Repository