Operating systems : an advanced course /

Fundamentals of Operating Systems /

Operations management : serving the customer /

Operations management. : Decision making in the operations function. /

Slovar’ oper.

Operative Gynäkologie /

Operational Amplifiers /

Operational amplifiers /

Operative Urologie 1

Operative urology 2.

Operative neurosurgery. Volume 1, Cranial, cerebral and intracranial vascular disease /

Linear operators. Part 3, Spectral operators /

Linear operators. Part 2, Spectral theory /

Linear operators. Part 1, General theory /

Operational Calculus /

Operator ideals /

Hydraulics for operators. /

Operations research /

Opere complete. /

Operative dentistry /

Opere.