00293nam a2200097Ia 4500008004100000082003000041100003800071245004200109260003600151300000800187140113s9999    xx            000 0 und d  a577-486:581.132.087.1  L5  a"Leith,H. & Whittaker, R.H., Ed."  aPrimary productivity of the biosphere  a1975bSpringer-VerlagcNew York  a339