Links
[1] https://web.library.yale.edu/lit
[2] https://web.library.yale.edu/departments/preservation/conservation-exhibition-services
[3] https://web.library.yale.edu/departments/preservation/digital-reformatting-microfilm-services/digital-analog-format-conversion
[4] http://web.library.yale.edu/digitizationguidelines
[5] http://copyright.cornell.edu/resources/publicdomain.cfm