Source:
Scientific American [Sci Am] 1969 Nov; Vol. 221 (5), pp. 23-9.Publisher: Scientific American Country of Publication: United States NLM ID: 0404400 Publication Model: Print Cited Medium:
Source:
Scientific American [Sci Am] 1968 Jul; Vol. 219 (1), pp. 19-27.Publisher: Scientific American Country of Publication: United States NLM ID: 0404400 Publication Model: Print Cited Medium: