John 1875- Edt Michels

• Science; V. 10 July-Dec (1887)
• Science; V. 13 Jan-June (1889)
• Science; V. 16 July-Dec (1890)
• Science; V. 17 Jan-June (1891)
• Science; V. 18 July-Dec (1891)
• Science; V. 22 July 1893-Jan 1894