|
| Rosas-López, Ulises and Collazo-Ortega, Margarita Conditions for the germination and the early growth of seedlings of Polaskia chichipe (Goss.) Backeberg and Echinocactus platyacanthus Link and Otto fa. grandis (Rose) Bravo-Hollis (Cactaceae): (with 2 tables & 2 figures). Phyton (B. Aires), Dec 2004, vol.73, p.213-220. ISSN 1851-5657
|
|