TY - Biodiv Sci A1 - Yong Yang T1 - Catalogue of global gymnosperms: problems and perspectives Y1 - 2012-11-20 JF - Biodiversity Science JO - Biodiv Sci SP - 755 EP - 760 VL - 20 IS - 6 UR - https://www.biodiversity-science.net N1 - 10.3724/SP.J.1003.2012.06005 ER -