Bob Robertson, Inc. v. Webster
In Bob Robertson, Inc. v. Webster, 679 S.W.2d 683 (Tex. App.--Houston 1st Dist. 1984, no writ), the court held that the written contract was not integrated despite a merger clause in the written agreement. Id. at 688-89.
The court stated that the "merger clause is contradicted by the instrument itself, which refers to delivery numerous times and yet contains no delivery date. It cannot be said that an oral agreement regarding time of delivery is inconsistent with the terms of the integrated agreement." Id. at 689.