The Xi Sigma Pi society had its beginnings back in 1908 at the University of Washington to encourage and foster high standards of scholarship and personal performance in the forestry and natural resource profession. Since that time the organization has grown, with chapters being formed at numerous universities all over the United States.
Mueller, Jo Ellen
"Xi Sigma Pi,"
Ames Forester: Vol. 68
, Article 30.
Available at: https://lib.dr.iastate.edu/amesforester/vol68/iss1/30