@book{bhlpg31085592, title = {1997 IUCN red list of threatened plants }, volume = {1997}, url = {https://www.biodiversitylibrary.org/page/31085592}, publisher = {}, author = {}, year = {1997}, pages = {Page 233}, } @book{bhlpg31193738, title = {IUCN Directory of Afrotropical Protected Areas }, volume = {1987}, url = {https://www.biodiversitylibrary.org/page/31193738}, publisher = {}, author = {}, year = {1987}, pages = {Page 1003}, } @book{bhlpg43695637, title = {Yearbook of the Heather Society }, volume = {1996}, url = {https://www.biodiversitylibrary.org/page/43695637}, publisher = {The Society}, author = {Heather Society }, year = {1996}, pages = {Page 15}, }