. Population.viability.analysis.of.Opuntia.humifusa.at.. . Point.Pelee.National.Park . Halpenny,.Elizabeth.A ..2006 ...Environmental.Behavior,.. . Place.Attachment.and.Park.Visitation:.A.case.study.of.. . visitors.to.Point.Pelee.National.Park,.PhD.Thesis,.. . University.of.Waterloo ..
. Population.viability.analysis.of.Opuntia.humifusa.at. . Point.Pelee.National.Park . Halpenny,.Elizabeth.A ..2006 ...Environmental.Behavior,. . Place.Attachment.and.Park.Visitation:.A.case.study.of. . visitors.to.Point.Pelee.National.Park,..Thèsede.. . doctorat,.Université.de.Waterloo .