Directories -- Directories 2 Libraries -- 2 Computer-network resources -- 1 Economic -- 1 Education, Higher -- 1 Government -- 1 more ... Handbooks, manuals, etc 1 Handbooks, manuals, etc. -- 1 Information services -- 1 Occupational training -- 1 Periodicals -- 1 Private universities and colleges -- 1 Training needs -- 1 less ...