Due to severe complications following major surgery of the principal investigator in the spring of 1976, the planned research program had to be curtailed.
"Report on the 1976 Study Phase of the Investigation of Communication Systems in Free-ranging Wild Ungulates,"
Jackson Hole Research Station Annual Report: Vol. 1976
, Article 2.
Available at: http://repository.uwyo.edu/jhrs_reports/vol1976/iss1/2