Botkin, Daniel B.
Environmental studies: the earth as a living planet / Daniel B. Botkin - Columbus : Charles E.Merrill Publishing, 1982. - vii, 506. figures.
Earth : Environmental studies
550
Environmental studies: the earth as a living planet / Daniel B. Botkin - Columbus : Charles E.Merrill Publishing, 1982. - vii, 506. figures.
Earth : Environmental studies
550