SDS Sigma series was created in 1965.
Sigma Sigma Rho was created in 1998.
SDS Tuberculosis Sanatorium was created in 1948.
Phi Sigma Sigma was created on 1913-11-26.
Sigma Pi Sigma was created on 1921-12-11.
Sigma Mu Sigma was created on 1921-03-25.
Kappa Sigma Sigma was created on 1916-05-10.
Lambda Sigma was created in 1922.
Eugraphe sigma was created in 1775.
Sigma Alimentos was created in 1980.
Sigma Editions was created in 1998.
Sigma Motors was created in 1994.
Sigma Pharmaceuticals was created in 1912.