Slatyer, R. O. Dynamic changes in terrestrial ecosystems: patterns of change, techniques for study and applications to management / by R. O. Slatyer. - París : UNESCO, 1977. - 30 p. : il., fot. - MAB technical notes ; 4 . ISBN: 9231014587 No. de Clasificación Universal Decimal: 577.4 =20 SLA No.4