@book{344828,
	title = {Principles of system dynamics - with agricultural, aquacultural, environmental, and socio-economic applications.},
	publisher = {Agrotech Publishing Academy,},
	year = {1998.},
	address = {[S.l.] :},
	note = {Unknown Binding.},
	url = {http://www.amazon.com/exec/obidos/ASIN/8185680345/chopaconline-20}
}