1. Late Quaternary history of the Nile;Adamson;Nature,1980
2. Flora of the inundated Wadi Halfa reach of the Nile, Sudanese Nubia, with notes on adjacent areas;Ahti;Ann. Bot. Fenn.,1973
3. Silicon oil as a mounting medium for pollen grains;Andersen;Dan. Geol. Unders. Raekke 4,1960
4. The Flora of Erkowit;Andrews,1947
5. The vegetation of the Sudan;Andrews,1948