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.
Sigma-Tau was created in 1957.
Sigma Designs was created in 1982.
Eugraphe sigma was created in 1775.
Sigma Editions was created in 1998.
Sigma Alimentos was created in 1980.