?The Laura Boulton Collection of Woeld Music and Instruments, School of International Affairs Columbia University [紹介パンフレット]、?Laura Boulton,The Music Hunter (1969, Doubleday & Co.)の広告コピー、?Columbia University School of International Affairsから、The music of World Culture: the Catalogue and Commentary from the Laura Boulton Collection of Traditional and Liturgical Muaic刊行案内の書簡?上記を送付したColumbia University封筒1