@book{50190,
	author = {Erdman, Michael D. and Center for Energy and Environment Research San Juan, P.R.},
	title = {Biogas potential in the Republic of Panama},
	publisher = {Center for Energy and Environment Research, University of Puerto Rico, U.S. Dept. of Energy},
	year = {[1981?]},
	address = {[San Juan]},
	note = {"CEER-X-113"--Cover.}
}