00295nam a2200085Ia 4500008004100000082002400041100001200065245009100077260004100168220204s9999    xx            000 0 und d  a630:537.56/.58bLYN  aLYNN, M 0aIonizing radiations in forests and forestry (excluding the use of radioactive tracers)  aOxfordbCommonwealth Forestry Bureau