No Inv.: 1527-1528/Perp/85/2c
No Inv.: 2577/P/Perp/89/1c
No Inv.: 904/S/Perp/90/1c
No Inv.: 1338/S/Perp/89/1c
Judul asli : "The Price System and Resource Allocation"
No Inv.: 561-562/BD/Perp/86/2c
No Inv.: 853/S/Perp//87/1c
No Inv.: 1440-1442/P/Perp/94/3c~1861-1865/P/Perp/95/5c
No Inv.: 2810/Perp/86/1c
No Inv.: 3396-3400/P/Perp/95/5c