"1907-11-26Z"^^ . . "2013-09-23Z"^^ . . . "1907Z"^^ . "Ruth Myrtle Patrick (November 26, 1907 \u2013 September 23, 2013) was a botanist and limnologist specializing in diatoms and freshwater ecology, who developed ways to measure the health of freshwater ecosystems and established a number of research facilities."@en . . . . . "Americanbotanistandlimnologist" . "Ruth Patrick"@en . . . . "Patrick, Ruth"@en . . "2013Z"^^ .