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The Shambala system of agriculture (Usambara)
Attems, M. G., (1969)
Planning and evaluation in aid organizations
Forss, Kim, (1985)
Case studies from Bolivia, Malta, India, Sri Lanka, Tanzania, Zambia. - 1986. - XIV, 401 S.
Vahčič, Aleš, (1986)
Automatic section skip transport in aluminium extrusion plants.
Gläser, B., (1993)