Use the CALL NUMBER to find it! It's not always a number. The first line gets you to the right section. Then you get to the sublocation with the information after that: go in alphabetical or numeric order.
UNDERSTANDING CALL NUMBERS IN THE GREGORI LIBRARY:
The CALL # tells you the type of book and where to find it. Look for corresponding library signs to find the correct section.
SP, CHI, RUS, FRE, ARA = World Languages (by Biographies)
then in organized in alpha & numeric order