It has been so long since I've used a St Joseph guide (show-off :p ) -- Isn't there a bit in the beginning of it that explains the notation?
Since I do not have a paper copy, I will parse an example from the St Francis de Sales page, and an extra-tricky example at that:
Sunday 20 December 2009, The Fourth Sunday of Advent, taking one office at a time:
]MP 112 (926) (Ant 126);
Morning Prayer, Proper of Seasons, beginning on p 112 you will find the psalm antiphons, reading, responsory, intercessions, and prayer.
Beginning on p 926, Psalter, you will find the psalms to use (the antiphons are handily reprinted here in small type).
The antiphon for the Benedictus (Canticle of Zacariah) is taken from p 126, "20 December".
I hope Daytime Prayer is self-explanatory.
*]EP (114) 931 (Ant 127);
Just like Morning Prayer, the Proper of Seasons begins on p 114.
The psalms on p 931 of the Psalter.
The Magnificat (Caticle of Mary) antiphon on p 127.
Again, Night Prayer is self-explantory.
*][OOR 1850, Rd 1810f & 1942f; TD Pr 113]
The Office Of Readings, psalms begin on p 1850.
Read one of the biblical readings in the section beginning on p 1870, and one of the non-biblical readings from the section beginning on p 1942.
It is Sunday outside of Lent, so pray the Te Deum (hope you saved the insert).
The closing prayer of the office is the same as Morning Prayer, found on p 113.
(* The St Frances de Sales page misprints this as "1810")