We believe it is useful to restate the objectives of the Series, expressed in the preface of its first volume. The purpose is to provide agricultural researchers in each country or group of countries a substantial portion of material on beans, cassava, or tropical pastures, published in those countries, by means of a single instrument that allows for easy, organized access to the collective work of the country or region. It is also our purpose to create an inventory. Readers will find that the bibliography presented is incomplete and that references to some of their own publications, or to those of other authors they know, are missing. We encourage you to let us know about those deficiencies, and, in addition, to send us copies of missing publications, so theycan be indexed for the database and appear in future publications such as this one. We also ask you to send us the publications that you produce in the future to help us keep our document collection current.