1. Pruitt, M.E.; Baggett, J. M. U.S. Patent 2,706,181, 1955.
2. Pruitt, M.E.; Baggett, J.M.; Bloomfield, R.J.; Templeton, J. H. U.S. Patent 2,706,182, 1955.
3. Pruitt, M.E.; Baggett, J. M. U.S. Patent 2,706,189, 1955.
4. Fractionation of Partially Isotactic Polypropylene Oxide