The publication of this memorandum has been made possible by a grant from the Overseas Development Administration of the United Kingdom, through the Intermediate Technology Development Group (ITDG, London). The International Labour Office and the United Nations Industrial Development Organisation acknowledge this generous support.

Note to the UNIDO Edition

The choice of the most appropriate technology to be applied in industrial production activities is one of the many problems which developing countries face in the process of promoting industries in their countries. An appropriate choice can only be positively made when there is an effective and functioning flow of information about the available alternatives.

The International Labour Office (ILO) and the United Nations Industrial Development Organization (UNIDO) are both engaged in activities to assist the developing countries in the promotion of small and medium scale industries. The two organizations agreed upon to develop joint programmes that could contribute to enhancing the capacity for appropriate choice of technology. One such programme was to make combined efforts in preparing a series of Technical Memoranda in selected critical and priority sectors of industry in order to disseminate information on alternative production technologies.

The present is the fourth volume in the series. The first, second and third volume are entitled:

- "Tanning of Hides and Skins" (UNIDO/IS. 326);
- "Small-scale Manufacture of Footwear" (UNIDO/IS. 354); and
- "Small-scale Weaving" (UNIDO/IS. 454).

It is hoped that the publication will be found useful in stimulating the development of the small-scale oil extraction industry in the developing countries.

G.S. Gouri
Director
Division for Industrial Studies

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