Encyclopedia of Horticulture - J. Coutts; A. Osborn A. Edwards (New Delhi Akashdeep Publishing House, 1989)
J. Coutts; A. Osborn & A. Edwards: Encyclopedia of Horticulture. New Delhi. Akashdeep Publishing House, 1989. 81-7158-016-5--(635.03COU)
ENGLISH