Normally material used in the library is obtained from specified sources that have imposed controls on its technical and/or editorial content. The following codes are used to detail the source of an article

WVPAC Papers from WVPA Global Congress
WVPAAS Papers from WVPA Asia Meetings
SPON Papers from our sponsor
IHP Articles from International Hatchery Practice
IPP Articles from International Poultry Production
HTS Papers from the Hafez Turkey Symposium
PA Papers from the Poultry Africa Conference