Ban goc (Tiếng Anh)

This etext was prepared by Nigel Lacey, Leicestershire, UK. Transcriber's Notes: I have used the UK pound symbol (£) in this e-text as it appears in the original. [It looks like an L with a crossbar.] I am uncertain whether this symbol will be supported on all systems and fonts that this text file ends being viewed with. My apologies if this applies to you. I have endeavoured to retain the original table formatting, rather than to reformat the tables in alignment with the tex