Autor
Barrera, Víctor Hugo
Escudero, Luis
4
Norton, George W.
4
Alwang, Jeffrey
3
Crissman, Charles
2
Sherwood, Stephen
2
Andrade López, Robert Santiago
1
Basantes, L.
1
Cole, Donald C.
1
Espinosa A., Patricio
1
Heredia, Gerardo
1
Mauceri, Maria
1
Monar B., Carlos
1
Pumisacho, Manuel
1
Pérez, M.
1
Quishpe, David
1
Wood, Stanley
1
Yumisaca, Fausto
1