Sprechender Beton
Subtitle: wie Rudolf Steiner den stahlbeton verwendete
By:  [by] Rex Raab, Arne Klingborg and Ake Fant.
Contributors: Klingborg, Arne.; Fant, Ake.
Publisher: Philosophisch-anthroposophischer
Published: 1972
Place of publication: Dornach
Language: ger
Subjects: Steiner, Rudolf, -- 1861-1925