10 September 1973; Department of Education; Circular;
19 June 1973; Department of Finance; Circular;
24 May 1973; Department of Finance; Circular;
13 May 1973; Department of Finance; Circular;
26 April 1973; Department of Finance; Circular;
8 April 1973; Department of Finance; Circular;
8 December 1972; Department of Finance; Circular;
14 August 1972; Department of Finance; Circular;
17 July 1972; Department of Finance; Circular;
12 June 1972; Department of Finance; Circular;