00341nam a2200097Ia 4500008004100000082001700041100002500058245011400083260003800197300000800235140113s9999    xx            000 0 und d  a631.46:577.4  a"Philipson, J., Ed."  a"Methods of study in quantitative soil ecology :population, production and energhy flow (IBP Handbook no.19)"  a1971bBlackwell Sci. Pub.cOxford  a297