title: [Reaction to a letter sent by Mr. R.F. Bergsma].
authors.forename: Aline
authors.initials: A
authors.lastname: Noordam
mesh_terms: D003132:Commerce; D019058:Community Networks; D003299:Cooperative Behavior; D006801:Humans; D009426:Netherlands; D014730:Veterinary Medicine / Q000191:economics*