The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive index. 351 color photos or illustrations, Free of charge in digital format on Google Books,
The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographic index. 114 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 extensive subject and geographical index. 318 photographs and illustrations - many 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. 368 photographs and illustrations - many in color. Free of charge in digital PDF format.
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
The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographical index. 526 photographs and illustrations - mostly color. Free of charge in digital PDF format.