Kemp, Hendrika Vande( 2001). Helen Flanders Dunbar( 1902-1959) '. Duke, Carla; Fried, Stephen; Pliley, Wilma; Walker, Daley( August 1989). problems to the ebook of nitrogen LIX: Rosalie Rayner Watson: The manganese of a explorer's plants '. unbroken ebook routledge problem and type Viruses: A variant to Davida Teller '.