John R. Gregg （1954年刊行，Columbia University Press［Columbia Bicentennial Editions and Studies］, New York, xii+71 pp.） 【目次】 General editor's preface v Foreword vii 1. Sets 3 2. Sets of ordered pairs, or relations 11 3. Hierarchies…

Walter Wilson Greg （1927年刊行，Clarendon Press, Oxford, vii+63 pp.／Reprinted in 1971: Folcroft Library Editions → 書評｜目次｜情報） 【目次】 Preface v General notions: Descent and variation 1 Recording variants 14 Types of variants 18 …