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by Derham, Ruth
by Romero, Dani Ruth
by Fox, Ruth
by Shaw, Ruth
by Cummins, Lucy Ruth; Cummins, Lucy Ruth
by Francisca Pou Giménez, Ruth Rubio Marín, and Verónica Undurraga Valdés
by Nature Center, Fair Hill; Michener, Erlene; Hannum, Holly; et al.
by Heisler, Ruth; Hebert, Nora; Krabbenhoft, Karen; et al.
by Ozeki, Ruth
by Shagoury, Ruth; Power, Brenda Miller