Ben Prof 1 85 DNA IB (BX NO. 29)
BEN PROF 1/100 DNAIB (BX NO.32)
BEN PROF 1/ 73 VOL.IV DNA IB (BX NO. 26)
Ben Prof 1 104/VOL III DNA IB (BX NO.33)
BEN PROF 1/103 DNAIB (BX NO.32)
BEN PROF 1/79 VOL.III DNA IB (BX NO. 28)
BEN PROF 1/101 DNAIB (BX NO.32)
BEN PROF 1/ 94 DNA IB (BX NO. 31)
BEN PROF 1/104 A DNAIB (BX NO.32)
Ben Prof 1 95 DNA IB (BX NO 31)