@inbook{ GUTIERREZ:107-122,

author = { JOSE GUTIERREZ PEREZ } ,

title = { QUALITATIVE ENVIRONMENTAL RESEARCH, A LOOK AT THE SUSTAINABILITY WORLD: ADVANCES, OPPORTUNITIES AND ALTERNATIVE INDICATORS SYSTEMS },

booktitle = { ANALISIS DE LA INVESTIGACION EDUCATIVA },

isbn = { 84-338-1810-4 },

publisher = { DESCONOCIDO },

pages = { 107 - 122 },

year = { 1993 },

}