Reference: Gamon 1997

Gamon, David Charles. 1997. The Grammaticalization of Grammatical Relations: A typological and historical study involving Kashaya Pomo, Old English, and Modern English. University of California at Berkeley dissertation. (793pp.)

@phdthesis{gamon1997grammaticalization,
  author = {David Charles Gamon},
  pages  = {793},
  school = {University of California at Berkeley},
  title  = {The Grammaticalization of Grammatical Relations: A typological and historical study involving Kashaya Pomo, Old English, and Modern English},
  year   = {1997}
}