Dragon - Sigma Imperative - New paperback or softback - X555z

Jackson - SIGMA Conundrum - New paperback or softback - X555z

Croce - Sigma - New paperback or softback - X555z

Randolph - Sigma Rising - New paperback or softback - X555z

Sigma Phi. - Catalogue of the - New paperback or softback - X555z

Finley - Sigma Male Mentality - New paperback or softback - 85 - X555z

Uskoski - Sigma/Star Volumes 1 2 - New paperback or softback - X555z

Sigma Phi Epsilon - Journal 3 No. 3 - New paperback or softback - X555z