• 
  Online resource available at: JSTOR Access Initiative
• Available from 03/01/1947 volume: 1 issue: 1/2.
  Most recent 3 year(s) not available.
  
• 
  Online resource available at: JSTOR Biological Sciences Collection
• Available from 03/01/1947 volume: 1 issue: 1/2.
  Most recent 3 year(s) not available.
  
• 
  Online resource available at: JSTOR Ecology and Botany I
• Available from 03/01/1947 volume: 1 issue: 1/2.
  Most recent 3 year(s) not available.
  
• 
  Online resource available at: JSTOR Life Sciences Collection
• Available from 03/01/1947 volume: 1 issue: 1/2.
  Most recent 3 year(s) not available.
  
• 
  Online resource available at: BioOne Complete
• Available from 2000 volume: 54 issue: 1 until 2009 volume: 63 issue: 12.
  
• 
  Online resource available at: Factiva
• Available from 02/01/2001 until 11/30/2005.
  
• 
  Online resource available at: Factiva - Classic
• Available from 02/01/2001 until 11/30/2005.
  
Public notes:
• This link will not go directly to the article.
  
• 
  Online resource available at: Oxford University Press Journals Current Show license Hide license
• Available from 02/01/1996 volume: 50 issue: 1.
  
• 
  Online resource available at: Wiley Sold Journals Collection
• Available from 1947 volume: 1 issue: 1-2 until 2022 volume: 76 issue: 12.
  

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