UNEXPECTED FACES IN ANCIENT AMERICA (1500 B.C.–A.D. 1500): THE HISTORICAL TESTIMONY OF PRE–COLUMBIAN ARTISTS ALEXANDER VON WUTHENAU 1975
THE FUNDAMENTAL PRINCIPLES OF OLD AND NEW WORLD CIVILIZATIONS: A COMPARATIVE RESEARCH BASED ON A STUDY OF THE ANCIENT MEXICAN RELIGIOUS, SOCIOLOGICAL AND CALENDRICAL SYSTEMS ZELIA NUTTALL 1901
THE INDIAN RACES OF NORTH AND SOUTH AMERICA: COMPRISING AN ACCOUNT OF THE PRINCIPAL ABORIGINAL … BROWNELL 1864
THE SECRET OF THE PACIFIC: A DISCUSSION OF THE ORIGIN OF THE EARLY CIVILISATIONS OF AMERICA, THE TOLTECS, AZTECS, MAYAS, INCAS, AND THEIR PREDECESSORS; AND OF THE POSSIBILITIES OF ASIATIC INFLUENCE THEREON C. REGINALD ENOCK 1912
MEXICAN AND CENTRAL AMERICAN ANTIQUITIES, CALENDAR SYSTEMS, AND HISTORY, GERMAN PAPERS TRANSLATED CHARLES P. BOWDITCH 1904
AN OUTLINE DICTIONARY OF MAYA GLYPHS; WITH A CONCORDANCE AND ANALYSIS OF THEIR RELATIONSHIPS WILLIAM GATES 1931