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Aspects and successions of some grassland vegetation in the Rukwa Valley, a permanent breading area of the red locust
Backlund, Helge O.
Bok Engelsk 1956
Swedish enchytraeidae. 2..
Backlund, Helge O.
Bok Språk ikke angitt 1947
Swedish enchytraeidae. 1.. With anatomical remarks, and with notes on three lumbricidae
Backlund, Helge O.
Bok Språk ikke angitt 1946
Wrack fauna of Sweden and Finland : ecology and chorology
Backlund, Helge O.
Bok Engelsk 1945