TY  - GEN
AU  - Forty years after: Pius XI and the social order, a commentary. xvi, 328 p. ; 23 cm.
TI  - Pius XI, Pope, 1922-1939. Quadragesimo anno (15 May 1931)
AV  - HD 6338 .C3 M54 
KW  - Church and labor
N1  - Leo XIII, Pope, 1878-1903. Rerum novarum (15 May 1891)
ER  -