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RT @isf_tubs: At the symposium for the 60th birthday of Arnd Poetzsch-Heffter, @i_schaefer gave an overview on the history of delta orienta…
RT @isf_tubs: At the symposium for the 60th birthday of Arnd Poetzsch-Heffter, @i_schaefer gave an overview on the history of delta orienta…
At the symposium for the 60th birthday of Arnd Poetzsch-Heffter, @i_schaefer gave an overview on the history of delta orientation. https://t.co/xBNtnCI0Ol https://t.co/2pwLZ8A7Mh