https://muzeumcyfrowe.pl/en/dlibra/publication/3073/edition/2669/cylindropuntia-leptocaulis-dc-f-m-knuth
Cylindropuntia leptocaulis (DC.) F.M. Knuth - Museum of University of Wroclaw
Museum of University of Wroclaw , is created by Wroclaw University Library
cylindropuntia leptocaulisf mdcknuthmuseum