Protozoa . Porifera (sponges) . Coelenterata & ctenophora . Echinodermata /
Protozoa . Porifera (sponges) . Coelenterata & ctenophora . Echinodermata /
by Marcus Hartog [et al.].
- London : Macmillan and co., 1906.
- VII, 671 p. : ill. ; 24 cm.
- The Cambridge natural history / edited by S. F. Harmer and A. E. Shipley ; 1 .