Books by P. J. Lydon:
Books in the extended shelves:
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Lydon, P. J. (Patrick Joseph), 1883-1969: Penal legislation in the new Code of canon law (liber v) (Benziger Brothers, 1944), also by H. A. Ayrinhac (page images at HathiTrust)- Lydon, P. J. (Patrick Joseph), 1883-1969: Penal legislation in the new code of canon law (liber v) (Benziger brothers, 1936), also by H. A. Ayrinhac (page images at HathiTrust)
Find more by P. J. Lydon at your library, or elsewhere.