The Emerald of Sigma Pi, Vol. 42, No. 4, February 1956 The Emerald of Sigma Pi, Vol. 43, No. 1, May 1956 The Emerald of Sigma Pi, Vol. 43, No. 2, August 1956 The Emerald of Sigma Pi, Vol. 43, No. 4, Winter 1957 The Emerald of Sigma Pi, Vol. 44, No. 1, Spring 1957 The Emerald of Sigma Pi, Vol. 44, No. 2, Summer 1957 The Emerald of Sigma Pi, Vol. 44, No. 3, Fall 1957 The Emerald of Sigma Pi, Vol. 44, No. 4, Winter 1958 The Emerald of Sigma Pi, Vol. 45, No. 1, Spring 1958 The Emerald of Sigma Pi, Vol. 45, No. 2, Summer 1958 The Emerald of Sigma Pi, Vol. 45, No. 3, Fall 1958 The Emerald of Sigma Pi, Vol. 45, No. 4, Winter 1959 The Emerald of Sigma Pi, Vol. 46, No. 1, Spring 1959 The Emerald of Sigma Pi, Vol. 46, No. 2, Summer 1959 The Emerald of Sigma Pi, Vol. 46, No. 3, Fall 1959 The Emerald of Sigma Pi, Vol. 46, No. 4, Winter 1960 The Emerald of Sigma Pi, Vol. 47, No. 1, Spring 1960 The Emerald of Sigma Pi, Vol. 47, No. 2, Summer 1960 The Emerald of Sigma Pi, Vol. 47, No. 3, Fall 1960 The Emerald of Sigma Pi, Vol. 48, No. 1, Spring 1961