Mo. Rev. Stat. § 358.220
358.220 Right to an account.
358.220. Right to an account. — Any partner shall have the right to a formal account as to partnership affairs:
(1) If he is wrongfully excluded from the partnership business or possession of its property by his copartners;
(2) If the right exists under the terms of any agreement;
(3) As provided by section 358.210 ;
(4) Whenever other circumstances render it just and reasonable.
(L. 1949 p. 506 § 22)