http://www.saint-petersburg.com/parks/michael-garden.asp

http://property.timesonline.co.uk/tol/life_and_style/property/gardens/article2538034.ece

http://www.museumgardenhistory.org/

http://www.gardenhistorysociety.org/

http://www.alaskabg.org/

http://botanicalgarden.berkeley.edu/

http://www.botanic-garden.ox.ac.uk/

http://www.kissingbeijing.com/travel/summer.htm