"In any arguement, but especially in arguments about abstract ideas, clear and consistent defintion of terms is essential. When the writer specifices her meaning, her assertion is much clearer." Little Brown Handbook (2007). p. 183
Credo Reference contains content from hundreds of reference books covering every major subject. There are over 2 million entries, 65,000+ images (art, diagrams, interactive maps and photos), and over 93,000 audio pronunciation files.