Mo. Rev. Stat. § 491.320
491.320 Validity of subpoena.
491.320. Validity of subpoena. — A subpoena issued by an associate circuit judge shall be valid to compel the attendance in an associate circuit judge's court of a witness, as provided in sections 491.010 to 491.270 .
(RSMo 1939 § 2650, A.L. 1945 p. 765 § 86) Prior revisions: 1929 § 2264; 1919 § 2814; 1909 § 7491