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==Literatur== | ==Literatur== | ||
[1] D. A. Abrams, Design of Concrete Mixtures, Bulletin 1, Structural Materials Research Laboratory, Lewis Institute, Chicago, 1918<br /> | [1] [https://ia801409.us.archive.org/15/items/designconcretem00abragoog/designconcretem00abragoog.pdf D. A. Abrams, Design of Concrete Mixtures, Bulletin 1, Structural Materials Research Laboratory, Lewis Institute, Chicago, 1918]<br /> | ||
[2] Stark, Jochen; Wicht, Bernd: Geschichte der Baustoffe. Springer-Verlag, 2013 | [2] Stark, Jochen; Wicht, Bernd: Geschichte der Baustoffe. Springer-Verlag, 2013 | ||
