Set of 3 good reference book, all folios. 1st book - 1973 edition, 41 x 28 cm.folio ,141 pages well illustrated and at the end a further 51 full page maps as reference,spanning from 1480 till 1500 2nd book - 1987 edition, 36 x 26 cm.folio ,160 pages,with original glassine cover, well illustrated and at the end a list of the 90 maps reference lists 3rd book - 1982 edition, 37 x 27 cm.folio , with original glassine cover, ,155 pages well illustrated and at the end with list of 85 maps as reference,spanning from the beginning Contemporary cloth binding .Condition as from photos. Internally the copies are fresh and crisp, Interesting reading total 3