• http://glencoe.mcgraw-hill.com/sites/dl/free/0078757134/383928/BL_04.html
     
     
    http://www.phschool.com/atschool/phbio/active_art/predator_prey_simulation/
     
     
    https://www.findagrave.com/cemetery/7896/memorial-search?firstname=&lastname=&cemeteryname=&page=1#sr-171106808