Brown, Lester R. Vital signs 1997 : the environmental trends that are shaping our future / Lester R. Brown, Michael Renner and Christopher Flavin edited by Linda Starke - New York : W. W. Norton, c1997. - 166 p. : ill. ; 24 cm. ISBN: 0393316378 LCCN: Subjects--Topical Terms: CalculusMathematical analysis.Topology. LC Class. No.: PS3608 / .E762V58 1997