| http://www.w3.org/ns/prov#value | - The drawings were done by a variety of artists, so the quality is somewhat mixed, but most of the drawings are very fine, and like the Golden Guide, some drawings provide clues about habitat and interesting behaviors.The National Geographic guide is both larger and thicker than the Golden Guide, so more unwieldy in the field, and lacks spectrographs, but birders immediately switched to it, in part
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