@misc{_XXI._1959,
 number={59},
 copyright={Public Domain},
 address={Kórnik},
 howpublished={online},
 year={1959},
 language={mul},
 title={XXI. Index Seminum Anno 1959 Collectorum Quae Instituti Arboretum Pro Mutua Commutatione Offer},
 type={Text},
 URL={http://www.rcin.org.pl/Content/186848/PDF/KOR001_168144_1959_XXI-Index-Seminum-A.pdf},
 keywords={catalog of seeds, seeds of trees and shrubs, seed exchange, Kórnik Arboretum},
}