MathSciNet bibliographic data MR71449 10.0X Chowla, S.; Briggs, W. E. On the number of positive integers \$\leqq x\$$\leqq x$ all of whose prime factors are \$\leqq y\$$\leqq y$. Proc. Amer. Math. Soc. 6 (1955), 558–562. Article

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