Do you see a problem here? The apostles did address the importance of the Incarnation. They clearly spelled out the fulfilled scriptures involved. That is what was communicated by the Holy Spirit and written down.
You have made the statement that without Mary's intercession their is no salvation. If this is correct then I have to assume you believe the Holy Scriptures are incomplete, they are incomplete to make you wise for salvation through faith which is in Christ Jesus. Have I assumed correctly?
The message of the Incarnation is clear. God chose Mary as the Mediatrix for human salvation. From ancient times, it has always been to Jesus though Mary beginning with the First Miracle. The recurring and inherently contradictory thesis of all Protestant and other types of Bible Christianity is that they cannot answer the fact that it was through Divine Providence that the early Church fathers and theologians painstakingly assembled the books in the Bible over a period of three hundred years often rejecting several scripts as inauthentic. This Divine mandate in interpreting the true Word of God did not disappear with the plague of Protestantism.
You ask for a reference on Mary, and one is provided. Instead of engaging in a careful read, it is dismissed as a cut-and-paste job. Of course, this is the kind of laziness one expects from shallow Bible Christians who easily dismiss the work of their own theologians who convert to Catholicism.
Yet we are told that the work of theologians, scholars and saints for hundreds of years must be discarded based on some interpretation given us by any one of the Tom, Dick, and Harry’s, or by the Mormons, Episcopalians, Moonies, or Jehovah’s Witnesses. This is sheer, unadulterated rot.
Christ taught ONE truth for ALL time. Only the Catholic Church has this ONE truth in its Credo. It has been re-affirmed by a galaxy of theologians both Catholic and converts to Catholicism. This leaves low-information Bible Christians stranded in their pews grasping for “their” own straws of interpretation.