This is a reproduction of a book published before 1923. This book may have occasional imperfectionssuch as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the orig
Young readers will learn how light works and where it comes from in this accessible, photo-filled book. Vibrant photos give life to basic science concepts in the text and encourage kids to explore lig
Showing the diversity of ethnic and national groups, Middle Ages: Biographies presents 50 biographical entries in 2 vols. Featuring people from a variety of professions and social classes, chronologic
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