Original: The 12-volume MicropÃ dia is one of the three parts of the 15th edition of EncyclopÃ dia Britannica, the other two being the one-volume PropÃ dia and the 17-volume MacropÃ dia.
Simplified: The 12-book MicropÃ dia is one of the three parts of the 15th edition of EncyclopÃ dia Britannica, and the other two being the one-book PropÃ dia and the 17-book MacropÃ dia.