Enter through the main entrance of Olin Library. Continue straight down the hallway until you pass through the archway with the words "Kroch Library" across the top.
The Severinghaus Reading Room (Reference Collection) is the first door on your left.
Continue down the corridor past the Reading Room and turn left at the first hallway to reach the Level 1 stacks. The Level B1 stacks are one flight down and can be reached by the stairs at either end of the stacks. The Mezzanine Level can be reached by using the staircase at the east end of the Level 1 stacks. (See Stacks Maps for call number ranges on each level.)