Below is the general outline for the Library of Congress call numbers for browsing areas in English language and literature. Reference works can be found in the reference room, 1st floor of Mullen. General collection books can be found in the Mullen Library stacks.
PE - English Language (2 South Mullen)
PN - Literature, Literary History and Collections (2 South Mullen)
PR - English Literature (1A Center and 1A South Mullen)
PS - American Literature (1A Center Mullen)
PZ - Juvenile / Misc. Literature (1A South Mullen)
Most of the material can be found in the PE, PN, PR, PS, and PZ call number ranges. For a detailed breakdown of each call number range, go to the Library of Congress classification outline.
Your best bet: check the WRLC catalog for monographs and journals that could be applicable to your topic. Check the CU’s e-journals for full text journal articles online.
Like to print things out to reference? You will find many of the resources and suggestions included in this LibGuide in these handouts.