Ben Prof 1 192 IDN IB (BX NO 65)
BEN PROF 1/116 VOL. III DNA IB (BX. NO. 37)
Ben Prof 1 194 IDN IB (BX NO 65)
BEN PROF 1/108/ VOL.III DNA IB (BX NO.34)
Ben Prof 1 180/VOL. IV IDN IB (BX NO. 60)
Ben prof 1/149/ vol V II. DNA IB (BX NO 50)
Ben Prof 1 194/2 IDN IB (BX NO 65)
BEN PROF 1/108 VOL. VII DNA IB (BX. NO. 34)
Ben prof 202/318 DNA IB (bx no .75)
BEN PROF 1/130 DNA IB (BX. NO. 44)