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1by Lebbe, Ishak
Published 1982Colombo : Agrarian Research & Training Institute, 1982.ix, 49 p. : maps ; 30 cm.“...Agrarian Research & Training Institute,...”
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2by Bandara, S. R.
Published 1983Colombo, Sri Lanka : Agrarian Research and Training Institute, 1983.x, 91 p. : ill., maps ; 28 cm.“...Agrarian Research and Training Institute,...”
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3Published 1983Colombo, Sri Lanka : Agrarian Research and Training Institute, [1983?]ii, 47 p. ; 29 cm.“...Agrarian Research and Training Institute,...”
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4by Wickramasinghe, Gamini
Published 1987Colombo, Sri Lanka : Agricultural Resource Management Division, Agrarian Research and Training Institute, 1987.viii, 63 p. : 1 map ; 29 cm.“...Agricultural Resource Management Division, Agrarian Research and Training Institute,...”