@misc{Stephany1978,
  author    = {Ursula Stephany},
  title     = {The modality constituent : a neglected area in the study of first language acquisition},
  booktitle = {Institut f{\"u}r Sprachwissenschaft, Universit{\"a}t K{\"o}ln: Arbeitspapier ; Nr. 36},
  issn      = {1615-1496},
  series    = {Arbeitspapier / Institut f{\"u}r Sprachwissenschaft, Universit{\"a}t K{\"o}ln},
  number    = {A.F. 36},
  type      = {workingpaper},
  pages     = {21},
  year        = {1978},
}