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Browsing by Author "Siegfried, WR"

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  • Ryan, PG; Steele, WK; Siegfried, WR; Vogel, JC (Bureau Scientific Publications, 1992-11)
    There are several problems associated with determining radiocarbon dates, particularly for organic material from Antarctica. However, this study attempts to find accurate measure of the length of time these radiocarbon ...
  • Siegfried, WR; Frost, PGH; Cooper, J; Kemp, AC (National Scientific Programmes Unit: CSIR, 1976-06)
    Data sheets are provided on 101 South African bird species thought to be eligible for conservation attention. A list is also provided of 35 species which might qualify for inclusion in a revised South African Red Data Book.