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28. [Water - hygienic hazards in the past today (author's transl)]. Schadewaldt H. Zentralbl Bakteriol Mikrobiol Hyg B; 1980 Jan 23; 172(1-3):275-97. PubMed ID: 7006272 [No Abstract] [Full Text] [Related]
29. History of the hospice movement. Campbell L. Cancer Nurs; 1986 Dec 23; 9(6):333-8. PubMed ID: 3542190 [No Abstract] [Full Text] [Related]
30. [Ophthalmic preparations from ancient times until today]. Ludwig A, Van Ooteghem M. J Pharm Belg; 2005 Dec 23; 60(3):97-103. PubMed ID: 16252512 [No Abstract] [Full Text] [Related]