Neergaard, P.P.F.M. 1943: Aarsberetn. J. E. Ohlens Enkes plantepatol. Lab. 1 April 1942-31 Marts 1943.
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| Neergaard, P.P.F.M. 1943: Aarsberetn. J. E. Ohlens Enkes plantepatol. Lab. 1 April 1942-31 Marts 1943. |