CORDA, A.J.C. 1839 Observations sur les Euastrées et les Cosmariées Alman. Carlsbad 9: 213-244, VI pls. [= 36 figs.] [incl. critique of Ehrenberg's Infusionsthierchen (1838); p. 211 of volume dated 30.xi.1838; separate of 32 pp., VI pls. listed by Pritzel]