Try to recollect some Yearbooks which have been covered viz. `Europa Yearbook', `Statesman's Yearbook' and `Yearbook of the United Nations' which include lists and descriptions of international organisations. Again, we have also discussed in this section, some information sources which are truely institutional directories but the word 'directory' does not occur in the title or it is replaced by terms yearbook, encyclopaedia, handbook, guide, register etc. Here, we will introduce you to some more yearbooks and directories dealing exclusively with information regarding institutions. They cover the structure, functions, addresses, objectives operational activities, office bearers, members and other important information about different institutions, organisations, associations etc.