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The tenacity of the virus of foot-and-mouth disease under field conditions
Jackson, Ralph; Pan-African Agricultural and Veterinary Conference (1929 : Pretoria, South Africa)
Article was scanned with HP Scanjet 5590, 24-bit true colour, 300 dpi, saved in TIFF-format.
Adobe Acrobat v.9 was used for the merging and conversion to the final presentation PDF-format.