The volumes of this series are published for the greater part by Inter Documentation Company AG, Switzerland (IDC). They are all of the same format and contain a general introduction in English, French, and, if necessary, in the language of publication. It is stated in this introduction that the volumes for Belgium, The United Kingdom and the United States will appear separately. This also holds for the Netherlands (see below: ROESSINGH and VISSER, forthcoming). Except for the United States and the United Kingdom volumes, which list documents relating to the whole continent, the guide only takes into account sources relating to Africa south of the Sahara, from Mauritania and Sudan to the Cape of Good Hope and including Madagascar and the off-shore islands (see also below: the Inventory ed. by C.Giglio).