The Master Surname Index (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these names;

James PLIVA, 1867 - 28 Dec 1946.
Barbara PLIVA, 1877 - 10 Sep 1952.
Edward PLIVA, 26 May 1905 - 6 Oct 1980.
Clara PLIVA, Sep 1910 - 27 Aug 1924 d/o James.
Jerry PLIVA, Nov 1914 - 27 Aug 1924 s/o James.
Robert Angus PLIVA, 26 Aug 1934 - 16 Jan 1939 s/o James.
James PLIVA, - 2 Jun 1994.
Peggy PLIVA, 18 Dec 1907 - 24 Mar 1984.
All buried in the Drumheller Cemetery.

Then there is mention of Gail (Peterson) PLIVA and Mrs PLIVA in the local history book "Munson & District".

For obituariy lookup and further research please contact the AGS Research Services Committee of the Edmonton Branch,
http://www.compusmart.ab.ca/abgensoc

The Edmonton Branch
http://agsedm.edmonton.ab.ca

Alberta Vital Statistics
http://www3.gov.ab.ca/gs/services/vpe/index.cfm
You can order death papers, however when ordering this you are given 2 options - the Certificate,
or a "Certified Photographic Print of the Registration of Death" which usually gives more information than that fancy Certificate.

Canada Online Phone
http://canada411.sympatico.ca/
or http://www.canada411.ca/

Government Genealogical Information
http://www3.gov.ab.ca/gs/information/vs/genealogy.cfm

Peter
for the AGS