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Preliminary note on the life-history of Gaigeria pachyscelis (Raill. and Henry, 1910), a hookworm of sheep
Ortlepp, R.J.; Union of South Africa. Dept. of Agriculture; Du Toit, P.J.
The articles have been scanned in colour with a HP Scanjet 5590; 600dpi.
Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.