Ben Prof 1 90 DNA IB (BX NO 30)
BEN PROF 1/100 VOL.II DNAIB (BX NO.32)
Ben Prof 1 104/ VOL II DNA IB (BX NO 33)
BEN PROF 1/102 VOL. I DNAIB (BX NO.32)
Ben Prof 1 102 DNA IB (BX NO 32)
Ben Prof 1 105 DNA IB (BX NO 33)
BEN PROF 1/ 74 VOL.IIA. DNA IB (BX NO. 26)
BEN PROF 1/79 VOL.IV DNA IB (BX NO. 28)
BEN PROF 1/103 VOL. II DNAIB (BX NO.32)
Ben Prof 1 108/VOL II DNA IB (BX NO. 33)