Herman, P. P.J., Nasionale Botaniese Instituut, Pretoria, South Africa

• Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i> Vol 21 No 3 (2002) - Reports
  The plant family Asteraceae: 4 Interesting growth forms and economic importance
  Abstract  PDF