MathSciNet bibliographic data MR624946 57R40 (58D05) Hatcher, A. On the diffeomorphism group of $S\sp{1}\times S\sp{2}$$S\sp{1}\times S\sp{2}$. Proc. Amer. Math. Soc. 83 (1981), no. 2, 427–430. Article

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