Mo. Rev. Stat. § 170.111
Before seeking to enter into contract with any school board, the publisher shall furnish the clerk of the school board with a duplicate printed list of the books and prices filed with the state board of education.
(L. 1963 p. 200 § 10-11, A.L. 1977 H.B. 130)
(Source: RSMo 1959 § 170.090)