Our biosphere /
Margalef, Ramón
Our biosphere / Ramón Margalef. - Oldendorf/Luhe : Ecology Institute, c1997. - 176 p. : ill. ; 25 cm. - Excellence in ecology ; 10 .
Our biosphere / Ramón Margalef. - Oldendorf/Luhe : Ecology Institute, c1997. - 176 p. : ill. ; 25 cm. - Excellence in ecology ; 10 .