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RŌHANA, Research Journal of the University of Ruhuna published
.
annually by the University of Ruhuna, Sri Lanka

Editorial board

Editor–in-Chief: Snr. Prof. P Hewage

Editorial board: Snr. Prof. LP Jayatissa
Snr. Prof. KKU Aruna Kumara
Snr. Prof. WTS Dammini Premachandra
Prof. CM Wickramatilake
Prof. KHM Ashoka Deepananda
Prof. SA Buddhika
Dr. Udayanga Galappaththi
Dr. BLS Thilakarathne
Mr. N Hettiarachchi
Mr. IDKL Fernando

Copy Editor: Mr. IDKL Fernando

Inquiries: The Librarian
University of Ruhuna
Matara 81000, Sri Lanka
EMail: rrj@lib.ruh.ac.lk
URL: http://www.lib.ruh.ac.lk/rohana/

ISSN 1391–0701
All Rights Reserved
© University of Ruhuna

University of Ruhuna
Matara 81000
Sri Lanka

subscription Rates:
local individuals and institutions LKR 1000
Individuals and institutions in foreign countries US $ 20

No part of this material protected by this copyright notice may be reproduced or utilized in any form or by any
means, electronic or mechanical, including recording or by any information storage and retrieval system, without
the written permission from the publisher, except as stated below. Single photocopies of single articles may be
made for private study or research. Illustrations and short extracts from the text of individual contributions may
be copied provided that the source is acknowledged, the permission of the authors is obtained and the Editorial
Board of the RŌHANA, Research Journal of the University of Ruhuna is notified.