From:
Charles Robert Darwin
To:
Ernst Philipp August (Ernst) Haeckel
Date:
20 Jan 1873
Source of text:
Ernst-Haeckel-Haus (Bestand A-Abt. 1: 52/29)
Summary:
On EH’s Die Kalkschwämme [1872].
Contributor:
Darwin Correspondence Project
On EH’s Die Kalkschwämme [1872].