Free fiction: Astounding Stories, March/April/May 1931

March 1931: At Project Gutenberg & Manybooks.
April 1931: At Project Gutenberg & Manybooks.
May 1931: At Project Gutenberg & Manybooks.

These are issued edited by Harry Bates. Scans of all issues edited by Bates, plus text versions of several issues, are also online.

Related: Fiction from Astounding/Analog (only stories edited by John W Campbell, Jr).