#  Search the Catalog 

 



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Although the Wolbach Library includes collections from both the Harvard College Observatory and the Smithsonian Astrophysical Observatory, our holdings are all searchable using Harvard's [HOLLIS Catalog](https://hollis.harvard.edu/).

- [More information and tips for using HOLLIS](https://guides.library.harvard.edu/hollishelp)
- Remember to [sign up for you HarvardKey](/faq/what-harvardkey "What is HarvardKey?") to get full access to digital collections