Christensen, R. O.
Most widely held works by R. O Christensen
Report on the tribes of Dir, Swat, and Bajour together with the Utman-khel and Sam Ranizai by A. H McMahon ( Book )
3 editions published in 1981 in English and held by 33 WorldCat member libraries worldwide
Dā khāwra aw dā khalak : da Dir, Swāt aw Bājuṛ da qabilu Otmānkhelu aw Samrānezay by A.H McMahon ( Book )
1 edition published in 1996 in Pushto and held by 1 WorldCat member library worldwide