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    • A contribution to a systematic study of the South African Aphids 

      Van Wyk, Jesse Huggett (Stellenbosch : Stellenbosch University, 1955-04)
      INTRODUCTION: The earliest work on African Aphids was done by Pred. V. Theobald. His first monograph appeared in 1914, and dealt with only thirty-five species of which nine where described so now to science. His later ...