"""El Silvestre", which Lankester kept when he sold the rest of his farm in 1955, was inherited by his daughter Dorothy (Fig. 20), but difficult financial circumstances made it seem impossible to fulfill Lankester's dream of conserving the place as an "orchid heaven". Dorothy was forced to put the garden up for sale. However, through the efforts of the Costa Rican Orchid Society and Costa Rican biologist Rafael Lucas Rodríguez, a group of members of the American Orchid Society (led by Rebecca T. Northen), raised half of the purchase price: $25,000. The other half was donated by the Stanley Smith Horticultural Trust of Great Britain." Pzage 370-1". doi:10.17658/issn.2058-5462/issue-07/kgazzard/p48. {{cite web}}: Missing or empty |url= (help)
Biekart, Henry M.; Northen, Henry T.; Northen, Rebecca T. (1954). "The Secret of the Green Thumb". Bulletin of the Torrey Botanical Club. 81 (5): 466. doi:10.2307/2482293. ISSN0040-9618. JSTOR2482293.
Swanson, C. P. (1951). "Home Orchid Growing.Rebecca Tyson NorthenOrchids and How to Grow Them.Adelaide C. Willoughby". The Quarterly Review of Biology. 26 (1): 61. doi:10.1086/397931. ISSN0033-5770.
Swanson, C. P. (March 1951). "Home Orchid Growing.Rebecca Tyson NorthenOrchids and How to Grow Them.Adelaide C. Willoughby". The Quarterly Review of Biology. 26 (1): 61. doi:10.1086/397931. ISSN0033-5770.
Allen, Carol (1996). North American native terrestrial orchids : propagation and production : conference proceedings, March 16 & 17, 1996, [held at the National Arboretum, Washington, D.C) /. Germantown, Md.: North American Native Terrestrial Orchid Conference. doi:10.5962/bhl.title.131246.
Biekart, Henry M.; Northen, Henry T.; Northen, Rebecca T. (1954). "The Secret of the Green Thumb". Bulletin of the Torrey Botanical Club. 81 (5): 466. doi:10.2307/2482293. ISSN0040-9618. JSTOR2482293.
Biekart, Henry M.; Northen, Henry T.; Northen, Rebecca T. (1954). "The Secret of the Green Thumb". Bulletin of the Torrey Botanical Club. 81 (5): 466. doi:10.2307/2482293. ISSN0040-9618. JSTOR2482293.
Swanson, C. P. (1951). "Home Orchid Growing.Rebecca Tyson NorthenOrchids and How to Grow Them.Adelaide C. Willoughby". The Quarterly Review of Biology. 26 (1): 61. doi:10.1086/397931. ISSN0033-5770.
Swanson, C. P. (March 1951). "Home Orchid Growing.Rebecca Tyson NorthenOrchids and How to Grow Them.Adelaide C. Willoughby". The Quarterly Review of Biology. 26 (1): 61. doi:10.1086/397931. ISSN0033-5770.