Luijpen, Wilhelmus Antonius Maria, 1922- Phenomenology on natural law / by William A. Luijpen , Translated from the author's Dutch manuscript by Henry J. Koren. - Pittsburgh : Duquesne University Press, [1967] - 249 p. 26 cm. - Duquesne studies Philosophical series, 22 . Subjects--Topical Terms: Natural LawLaw-Philosophy LC Class. No.: 340.1 / L968