L : General Education Works.
LA : History of Education.
LB : Theory and Practice of Education.
LC : Special Aspects of Education.
Q : General Science Works.
QA : Mathematics.
QB : Astronomy.
QC : Physics.
QD : Chemistry.
QE : Geology.
QH : Natural History - Biology.
In the meantime, Interlibrary Loan document delivery may be used to request digital scans of book chapters. Just complete the online request form through your ILL account. You can always access the forms and create an account from the ILL link on the bottom of every library homepage.