No Inv.: 80904-80905/P/02/2c
Judul asli :"The Economic theory of cooperative"
No Inv.: 80077/S/92/1c
No Inv.: 77019/S/01/1c
No Inv.: 80091/S/89/1c
No Inv.: 76748/S/01/1c
No Inv.: 76746/S/01/1c
No Inv.: 76659/S/01/1c
No Inv.: 76658/S/01/1c
No Inv.: 80894/S/02/1c