N. V. Clarke (Clarke, N. V.)

• 
  Cyperaceae of Namibia: An Illustrated Key
  by Namibia, Coleen Mannheimer, N. V. Clarke, National Botanical Research Institute (Namibia)
  Hardcover, National Botanical Research Institute, ISBN 0869764853 (0-86976-485-3)
• 
  Guide to the Common Plants of the Cuvelai Wetlands
  by Namibia, N. V. Clarke
  Hardcover, Ministry of Agriculture, Water, and Rural Development, ISBN 0869764446 (0-86976-444-6)