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The world's most comprehensive, well documented and well illustrated book on this subject. With extensive subject and geographical index. 224 photographs and illustrations - mostly color. Free of charge in digital PDF format on Google Books.
The world's most comprehensive, well documented and well illustrated book on this subject. With extensive subject and geographical index. 338 photographs and illustrations, many old and rare, many recent in color. Free of charge in digital PDF format on Google Books.
The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographic index. 268 photographs and illustrations - mostly color. Free of charge in digital PDF format.
The world's most comprehensive, well documented, and well illustrated book on this subject. With an extensive subject and geographical index. 76 photographs and illustrations. Free of charge in digital PDF format on Google Books.
The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographical index. 362 photographs and illustrations. Free of charge in digital PDF format on Google Books