Translation of: 'Brief an Forel'. Hofheim-Langenhain : Bahá'í Verlag, 1975.
Includes 'Abdu'l-Bahá's tablet to Dr Forel.
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Auguste Forel and the Bahá'í Faith by Auguste Forel. ISBN 0853980764. Published by Ronald in 1978. Publication and catalogue information, links to buy online and reader comments.
