Mo. Rev. Stat. § 180.120: Supreme court library to exchange publications with other states.

The supreme court library is hereby made and constituted the medium for exchange of the official publications of the various departments, institutions and bureaus of the state government, to be exchanged with the other states of the union for their official state publications, and the officials of this state in charge of said departments, institutions and bureaus, shall cause to be delivered to the supreme court library such number of copies of all their publications as is necessary to make such exchange, and for the use of the supreme court library.