The journal of the College of Science, Imperial University of Tokyo, Japan = Tokyo Teikoku Daigaku kiyo. Rika - Tokyo Teikoku Daigaku. Rigakubu. (The University, 1922)

The journal of the College of Science, Imperial University of Tokyo, Japan = Tokyo Teikoku Daigaku kiyo. Rika - Tokyo Teikoku Daigaku. Rigakubu. (The University, 1922)

The journal of the College of Science, Imperial University of Tokyo, Japan = Tokyo Teikoku Daigaku kiyo. Rika - Tokyo Teikoku Daigaku. Rigakubu. (The University, 1922)

Nature - Lockyer, Norman, Sir, 1836 -1920 (Macmillan Journals Ltd., etc, 1923)

Die Strudelwürmer (Turbellaria) - Steinmann, Paul, 1885 - (W. Klinkhardt, 1913)