When Healing Becomes Educating, Vol. 6 - Waldorf Research Institute

Basfeld M. Experimentelle Untersuchungen an einem Modell eines hydraulischen Widders.
Dissertation at the Max-Planck-Institut, Goettingen, 1980.
Basfeld M. Der hydraulische Widder als reales Symbol der menschlichen
Herztaetigkeit. Beitr Erw Heilk 1982; Nr. 1.
Husemann G. Demonstrations given for Upper Schools, teachers and physicians
in German-speaking countries; 1946–1949 with the first model (W. Wolf),
1964–1965 with the second model (Gebr. Braun), 1970–1973 with the third
model (Gebr. Braun).
Basfeld M. Demonstrations 1982 (internal teachers conference in Germany)
physics and biology teachers.
Husemann A.J. Demonstrations for Upper Schools from 1988.
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