No Inv.: 11912-11916/P/Perp/94/5c~1911-1915/P/Perp/95/5c
No Inv.: 330-339/BD/Perp/89/10c
No Inv.: 1767-1776/BD/Perp/89/10c
Judul asli : "Techniques of Population Analysis"
No Inv.: 459-460/Pemb/Perp/88/2c
No Inv.: 10964-10965/P/Perp/98/2c
Judul asli : "Speak for Success"
No Inv.: 4058-4067/S/Perp/91/10c
No Inv.: 2264-2266/P/Perp/91/3c~7126-7130/P/Perp/92/5c~9891-9895/P/Perp/92/5c~11585-11589/P/Perp/93/5c