| Biology of Plants, 7th Edition | Toward a new synthesis: Major evolutionary trends in the angiosperm fossil record |
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| 1981 An Integrated System of Classification of Flowering Plants |
PNAS [Proceedings of the National Academy of Sciences of the United States of America] 97: 7030-7036 available online• CS1 maint: multiple names: authors list• Cromie, Harvard Gazette, December 16, 1999.
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