Inventari d&#39;arbres fet per voluntaris <a href="http://www.nytimes.com/2011/05/31/nyregion/2-enthusiasts-compose-map-of-central-park-trees.html?_r=1">http://www.nytimes.com/2011/05/31/nyregion/2-enthusiasts-compose-map-of-central-park-trees.html?_r=1</a><br>
<br>Raf<br>