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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.
The most comprehensive book on this subject ever published. With 3,638 references,
The world's most comprehensive, well documented and well illustrated book on this subject. With extensive subject and geographical index. 363 photographs and illustrations - many in color. Free of charge in digital PDF format.