1. Johnson, H.N. and Casals, J. 1972. In: Transcontinental Connections of Migratory Birds and their Role in the Distribution of Arboviruses; edited by Cherepanov, A.I., et al. Publishing House "NAUKA". Siberian Branch, Novosibirsk.
2. Calisher, C.H. Personal communication. 1977.
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