I suspect that book was Gotta Sing! Gotta Dance! Yes, that's a good interview with her. She said Marie Dressler chastised her for doing so many musicals after the success of The Broadway Melody, but, of course, under contract, most actors did what they were told.
I've seen Anita Page interviews on YouTube, but I haven't looked recently. They may have been taken down. TCM did insert interviews with her that I've seen, but they weren't lengthy and just inserted between films on the channel about some topic or other that she would have knowledge about (Joan...