Floor 4,151
- Holdings shelved
- 4
- Survey
- incomplete
4 holdings are shelved on this floor. A shared floor records where volumes sit and nothing about what any of them says; these are neighbours, not relations.
- MS 7625.89 Dispute of the Expanding Bar
- MS 5237.38 Reading Room Sigma
- MS 6219.35 Register of Tolerated Exposure
- MS 7093.80 Spiral Landing Lambda