No Inv.: 330-331/Perp/83/2c
No. Inv. : 149267-149269/P/Perp/15/3c
No Inv.: 129853/S/Perp/11/1c
No Inv.: 2250/P/Perp/91/1c
No Inv.: 1256-1258/BD/Perp/91/3c~25-26/BD/Perp/86/2c
No Inv.: 117448/P/Perp/09/1c
No Inv.: 3904/P/Perp/91/1c
Paper from NARE Conferences held at Edge Hill College of Higher Education, August 1975 and January 1977