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EFFECTS OF PLANTING DENSITY ON YIELD, GROWTH, CROWN FORMS AND OTHER TREE CHARACTERISTICS IN HEVEA BRASILIENSIS MUELL. ARGNG AP; LEONG W; YOON PK et al.1981; ACTA HORTIC.; ISSN 0567-7572; NLD; DA. 1981; NO 114; PP. 111-112Conference Paper
