Catholic Church.
The Liturgy of the hours: according to the Roman rite. T. 3. Weeks of the Year 6-34 /

. - London : Collins,  1974 
. - xxvii, 835, 520, 854 p.  18 cm. 
 - (The Divine office, revised by decree of the Second Vatican Ecumenical Council and published by authority of Pope Paul VI )
<br/> 1. Advent season. Christmas season  <br/>  2. Lenten season. Easter season  <br/>  3. Ordinary time, weeks 1-17  <br/>  4. Ordinary time, weeks 18-34 <br/>