The Baldwin Library of Historical Children's Literature in the Department of Special Collections at the University of Florida's George A. Smathers Libraries contains more than 100,000 volumes published in Great Britain and the United States from the early 1600s through the current year. Its holdings of more than 800 early American imprints is the second largest such collection in the United States.
There are three types of sources:
1) Primary Sources
2) Secondary Sources
3) Tertiary Sources
Adapted from The Craft of Research by Wayne C. Booth, Gregory G. Colomb, Joseph M. Williams. Chicago: University of Chicago Press, c2008.