581.5 Cle E Clements, Frederick Edward, 1874- Experimental vegetation; the relation of climaxes to climates, by Frederick E. Clements and John E. Weaver. Washington, Carnegie Institution of Washington, 1924. vii, 172 p. gráfico, láms., tablas. 25 cm. (Carnegie Institution of Washington Publicacion no 355) "Bibliography" : p. 154