Books by Jan van Oort:
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Oort, Jan van, illust.: Het Vogeljaar: Nederlandsche Vogels in hun Leven Geschetst (second edition, in Dutch; Amsterdam: W. Versluys, 1913), by Jac. P. Thijsse (page images at HathiTrust; US access only)
Additional books by Jan van Oort in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Oort, Jan van, illust.: De Bonte Wei (in Dutch), by Jac. P. Thijsse, also illust. by Jan Voerman (Gutenberg ebook)- Oort, Jan van, illust.: Lente (in Dutch), by Jac. P. Thijsse, also illust. by Jan Voerman and L. W. R. Wenckebach (Gutenberg ebook)
Find more by Jan van Oort at your library, or elsewhere.