"Population, Rsources, Environment"
"Enrich, Paul. R. & Enrich, Anne H."
"Population, Rsources, Environment" - 1972 W.H.Freeman & Co. San Franscisco - 509
577.14:312 L2
"Population, Rsources, Environment" - 1972 W.H.Freeman & Co. San Franscisco - 509
577.14:312 L2


