Early dialectal diversity in South Slavic I

The large majority of the isoglosses which can be established in the South Slavic dialectal area date from the time of the disintegration of Common Slavic and from more recent periods (e.g., Ivi´c 1958: 25ff). The isoglosses have often shifted in the course of the centuries, so that their original position cannot always be determined. In this study I shall concentrate upon the dialectal differences which originated before the 10th century. At that time, Slavic was still a largely uniform language, though it was certainly not completely homogeneous