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Influence of Photoperiod and Temperature on Flowering of Campanula Carpatica "Blue Clips", Coreopsis Grandiflora "Early Sunrise", Coreopsis Verticillata "Moonbeam", Rudbeckia Fulgida "Goldsturm" and Lavandula Angustifolia "Munstead"
Catherine Margaret Whitman
出版Michigan State University. Department of Horticulture, 1995
URLhttp://books.google.com.hk/books?id=JvBmmuE539MC&hl=&source=gbs_api