Okla. Stat. tit. 15 § 155 : — CONTRACTSCONTRACT INTERPRETATION — Intention of Parties Ascertained from Writing TEXT PDF When a contract is reduced to writing, the intention of the parties is to be ascertained from the writing alone, if possible, subject, however, to the other provisions of this article. Okla. Stat. tit. 15, § 155 R.L. 1910, § 949.