Algae of the Western Great Lakes Area. With an Illustrated Key to the Genera of Desmids and Freshwater Diatoms
Wm. C. Brown Company Publishers, Dubuque, Iowa. 1962, revised edition. Grönt klotband, hårda pärmar, 977s. ca 24x17x6cm, 1,6kg. Illustrerad. Mycket gott skick, liten namnteckning, har ej skyddsomslag.