<page_title> List of premiers of Nova Scotia </page_title> <section_title> Premiers of Nova Scotia </section_title> <table> <cell> 20 <col_header> Premier (party) </col_header> </cell> <cell> John Buchanan (Progressive Conservative) <col_header> Premier (party) </col_header> </cell> <cell> October 5, 1978 September 12, 1990 <col_header> Period </col_header> </cell> </table>
John MacLennan Buchanan, PC served as the 20th Premier of Nova Scotia from 1978 to 1990.