@inproceedings{ RIVERA,

author = { JOSÉ RIVERA UTRILLA } ,

title = { Interaction of gases, vapors and liquids with coals and macerals at ambient temperatures, their use to characterize porosity },

booktitle = { Programa de conferencias del Departamento. (Materials Science and Engineering) },

year = { 1981 },

pages = { None - None },

location = { PENN STATE; ESTADOS UNIDOS DE AMERICA },

}