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Conservatoire botanique national des Pyrénées et de Midi-Pyrénées

Barriga, S., Boujenna, A., Garcia del Moral, L.F., 2004 . Seasonal chlorophyll evolution in needles of Wild pine (Pinus sylvestris L. var. nevadensis Christ.) as derterminde by temperature, photoperiod and relative water content. Naturalia Maroccana, 2(1-2): 285-290.