Shilova, N. B. Development of leaf trace and atem structure in some species of the genus Crataegus L. Sobretiro de: Botaniczeskii Zhurnal 58(2):177-178, 1973 LCCN: 56169 Subjects--Topical Terms: Hojas.Tallo.Tejocote--FisiologĂa y morfologĂa.