@Article{ GUTIERREZ:54-70,

author = { JOSE GUTIERREZ PEREZ } ,

title = { Evaluation of an action-research project by university environmental volunteers },

journal = { International Research in Geographical and Environmental Education },

year = { 2016 },

volume = { 21 },

pages = { 54-70 },

doi = { http://www.tandfonline.com/doi/full/10.1080/10382046.2016.1217077 },

}