Section, act July 21, 1932, ch. 520, § 201(e), 47 Stat. 713; Aug. 19, 1937, ch. 704, § 5(a), 50 Stat. 704; June 30, 1947, ch. 166, title II, § 206, 61 Stat. 208, authorized the creation of regional agricultural credit corporations within the farm credit districts.