"1973 by-election" . . "Lincoln by-election in 1973" . . . "by-election" . "Lincoln by-election" . "City of Lincoln Council election" . "a second controversial by-election" . "by-election in March 1973" . . . . . . "by-election in 1973" . . . "1973 Lincoln by-election" . "1973 Lincoln by-election" . "Lincoln" . . . . "1973 Lincoln by-election" . "by-election of 1973" . "1973-03-01" . . . "1973 (b)" . .