C. C. Heyn1924BooksTsimḥe Yisra'el bi-temunotA monographic study of the genus Prangos (Umbelliferae)The Lotus creticus groupThe annual species of MedicagoOn the cytotaxonomy of Onobrychis crista-galli (L.) Lam. and O. squarrosa VivStudies in Heptaptera (Umbelliferae)Author data: Open Library