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- [2] LECTURES ON THE TEACHING OF GEOGRAPHY, IV. NOTES ON GEOGRAPHICAL LABORATORIES GEOGRAPHICAL TEACHER, 1908, 4 (22): : 257 - 271
- [3] Concerning the tautomery of phenoles, IV.: Response. BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1921, 54 : 249 - 252
- [5] Concerning triphenylmethyl. [IV. Announcement.] BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1902, 35 : 1822 - 1840
- [8] Local hypersensitiveness IV. General considerations JOURNAL OF IMMUNOLOGY, 1927, 14 (01): : 61 - 75
- [9] Concerning tannin and the synthesis of similar materials. IV. BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1914, 47 : 2485 - 2504
- [10] Concerning polynuclear meatal ammoniacs. IV. Announcement BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1907, 40 : 4426 - 4434