In Olin and Uris, look for the map to the stacks posted next to the elevators and stairwells.
Each floor houses double-oversize (call number ++), oversize (call number+) and regular size books. Check your call number and then check the floor map at the head of each floor.
++ call number ranges have green labels at the end of each row.
+ call number ranges have pink labels at the end of each row.
Regular size have white labels at the end of each row.