@incollection{Werth81-relevance,
  author	= {Werth, P},
  editor	= {Werth, Paul},
  year		= {1981},
  title		= {The concept of 'relevance' in conversational analysis},
  booktitle	= {Conversation, Speech, and Discourse},
  publisher	= {Croom Helm},
  address	= {London},
  pages		= {129--154}
}