So my sister has found two different and current listing encyclopaedia of Aviculture, however I'm finding it hard to work out if one is better than the other (eg more detailed/accurate/up-to-date). The versions are Encyclopaedia of Aviculture by A Rutgers and K A Norris Encyclopaedia of Aviculture by Glen Holland If anyone here has any opinions and viewpoints on either or both of these publications I'd be most grateful to hear from you.
