![348 Episode 4: Lecture 4: The thyroid gland and hormones. Steinach's tests. Mental and physical rejuvenation treatments: [Discussion of 2 December 1922] by Rudolf Steiner](https://pbcdn1.podbean.com/imglogo/image-logo/1610428/steinerfulres300bw.jpg){kind=logo}
348 Episode 4: Lecture 4: The thyroid gland and hormones. Steinach's tests. Mental and physical rejuvenation treatments: [Discussion of 2 December 1922] by Rudolf Steiner
Rudolf Steiner Audio · Dale B. Brunsvold
December 14, 201732m 43s
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