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==== Referenzen ====
 
==== Referenzen ====
 
<references />
 
<references />
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[https://www.researchgate.net/publication/224987427_Der_Erdsonden-Warmespeicher_in_Crailsheim Crailsheim]: 60 Sonden 55m tief 3 m Abstand in 30m Kreis
 
[https://www.researchgate.net/publication/224987427_Der_Erdsonden-Warmespeicher_in_Crailsheim Crailsheim]: 60 Sonden 55m tief 3 m Abstand in 30m Kreis