The idea of flight came about when birds were closely studied. After all, they are the only creatures who can fly. This book will explain the mechanics of flight in the simplest way possible. That way, young learners can already become acquainted to the idea, and maybe expound it further as he/she grows. So grab a copy of this book today!

**** The Brit counterpart to Sheehy (in which it is recommended). The new edition places the author, title, subject indices in each volume. Many entries cite reviews from other sources. Rather tiresome recitation of selected chapter contents. 6,000 entries with references in the annotations to one or two thousand further books. Covers sci- tech and paleontology, anthro, patents, medicine, trades and crafts. Arranged by UDC classification. Provides no prices. Available in the US from American Library Assn. Annotation copyrighted by Book News, Inc., Portland, OR

Cette bibliographie commentee touche tous les domaines du savoir humain, soit de l'Art a la Zoologie;elle signale les ouvrages les plus importants soit des bibliographies, des index, des encyclopedies, des dictionnaires, des guides, des revues etc dont le support ed'information est soit du papier, soit un cd-rom, soit une base de donnees en ligne directe, soit un microforme ect. L'objectif du guide Walford est de devenir La source d'information sur tout type de reference, nonobstant le support technique.

Packed with tons of "fun facts about how and why everything flies," this book features dozens of hands-on activities.

Over 220,000 entries representing some 56,000 Library of Congress subject headings. Covers all disciplines of science and technology, e.g., engineering, agriculture, and domestic arts. Also contains at least 5000 titles published before 1876. Has many applications in libraries, information centers, and other organizations concerned with scientific and technological literature. Subject index contains main listing of entries. Each entry gives cataloging as prepared by the Library of Congress. Author/title indexes.