. "1954" . . . . . . . "A revised key to the adults of the British species of Ephemeroptera, with notes on their ecology" . "\u00C9ph\u00E9m\u00E8res -- Grande-Bretagne" . "Mayflies -- Great Britain" . "A revised key to the adults of the British species of Ephemeroptera, with notes on their ecology" . "Text" . .