World Conservation Monitoring Centre., International Union for Conservation of Nature and Natural Resources. Species Survival Commission., Walter, K. S., & Gillett, H. J. (1998). 1997 IUCN red list of threatened plants. Cambridge: IUCN - The World Conservation Union.
சிகாகோ பாணியிலான மேறà¯à®•à¯‹à®³à¯à®•à®³à¯World Conservation Monitoring Centre., International Union for Conservation of Nature and Natural Resources. Species Survival Commission, Kerry S. Walter, and Harriet J. Gillett. 1997 IUCN Red List of Threatened Plants. Cambridge: IUCN - The World Conservation Union, 1998.
எமà¯à®Žà®²à¯à®Ž மேறà¯à®•à¯‹à®³à¯ காடà¯à®Ÿà®¿World Conservation Monitoring Centre., International Union for Conservation of Nature and Natural Resources. Species Survival Commission, Kerry S. Walter, and Harriet J. Gillett. 1997 IUCN Red List of Threatened Plants. Cambridge: IUCN - The World Conservation Union, 1998.