References
- . Aho, K., Pyhälä, R. & Koistinen, J.: IgA deficiency and influenza infection. Scand J Immunol 5: 1089, 1976.
- . Hutchison, A.: The health of seafarers. 1. Historical background and present situation. WHO Chron 29: 387, 1975.
- . ILO/WHO: Joint ILO/WHO committee on the hygiene of seafarers. WHO Tech Rep Ser No. 224, 1961.
- . Pyhälä, R. & Aho, K.: Serum HI antibody and protection against influenza: A follow-up survey at community level of three epidemics caused by different H3N2-variants. Int J Epidemiol 4: 127, 1975.
- . Remington, J. & Desmonts, G.: Toxoplasmosis. In: Infectious diseases of the fetus and newborn infant, p. 191 (ed. J. Remington and J. Klein). W. B. Saunders Company, Philadelphia 1976.
- . Tomaszunas, S.: The health of seafarers. 2. International aspects. WHO Chron 29: 393, 1975.
- . WHO: Influenza in the world October 1974—September 1975. Weekly Epidemiol Rec 51: 29, 1976.
- . Vuksanovic, P.: The actual importance of exotic diseases among seamen. Bull Inst Marit Trop Med Gdynia 26: 201, 1975.