5 + 7 = 12 senses : Rudolf Steiner's contribution to the psychology [i.e. riddles] of perception /
Childs, Gilbert.
Stroud : Fire Tree Press,
1996.
On title-page the word 'psychology' is crossed through and substituted by a facsimile handwritten 'riddles'.
Steiner, Rudolf, 1861-1925.
Perception (Philosophy)