Lester R. Brown: Malsamoj inter versioj

"If You Like Challenges, There's No Greater Time to be Alive."] filmita intervjuo de with Lester Brown.

* eo [[http://www.satesperanto.org/eldonkooperativo/ Eldona Fako Kooperativa de SAT]]

* en [http://www.earth-policy.org/Books/PlanB_contents.htm ''Plan B:

Rescuing a Planet under Stress & a Civilization in Trouble''