@misc{_XXIII._1961,
 number={23},
 copyright={Public Domain},
 address={Kórnik},
 howpublished={online},
 year={1961},
 language={mul},
 title={XXIII. Index Seminum Anno 1961 Collectorum Quae Instituti Arboretum Pro Mutua Commutatione Offer},
 type={Text},
 URL={http://rcin.org.pl/Content/186859/PDF/KOR001_168149_1961_XXIII-Index-Seminum.pdf},
 keywords={catalog of seeds, seeds of trees and shrubs, seed exchange, Kórnik Arboretum},
}