Biological control of pests and weeds.
London: Edward Arnold, (1931. second edition), Octavo, photographs, text illustrations, very good copy in dustwrapper. Studies in Biology, no. 132. More
London: Edward Arnold, (1931. second edition), Octavo, photographs, text illustrations, very good copy in dustwrapper. Studies in Biology, no. 132. More
Sofia: Pensoft, 2008. Octavo, paperback, colour photographs. Pensoft Series Faunistica, No. 70. Dragonflies are a beautiful, important and conspicuous component of freshwater, whether still or flowing. They are also important indicators of freshwater quality and condition, which is significant for current and future conservation initiatives in South Africa. The country's..... More