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file U (Stack)Riemsdijk, J. T. van
"Scientific and Mechanical Toys"
photocopy from New Scientist, no. 318, December 20, 1962, pp. 690-693. Together with related correspondence (including from J. R. Millburn and D. W. Waters) copied from succeeding issues, January & February 1963.
[1996-168]
1962