The Emerald of Sigma Pi, Vol. 38, No. 1, May 1951 The Emerald of Sigma Pi, Vol. 38, No. 2, August 1951 The Emerald of Sigma Pi, Vol. 38, No. 3, November 1951 The Emerald of Sigma Pi, Vol. 38, No. 4, February 1952 The Emerald of Sigma Pi, Vol. 39, No. 1, May 1952 The Emerald of Sigma Pi, Vol. 39, No. 2, August 1952 The Emerald of Sigma Pi, Vol. 39, No. 3, November 1952 The Emerald of Sigma Pi, Vol. 39, No. 4, February 1953 The Emerald of Sigma Pi, Vol. 40, No. 1, May 1953 The Emerald of Sigma Pi, Vol. 40, No. 2, August 1953 The Emerald of Sigma Pi, Vol. 40, No. 3, November 1953 The Emerald of Sigma Pi, Vol. 40, No. 4, February 1954 The Emerald of Sigma Pi, Vol. 41, No. 1, May, 1954 The Emerald of Sigma Pi, Vol. 41, No. 2, August 1954 The Emerald of Sigma Pi, Vol. 41, No. 3, November 1954 The Emerald of Sigma Pi, Vol. 41, No. 4, February 1955 The Emerald of Sigma Pi, Vol. 42, No. 1, May 1955 The Emerald of Sigma Pi, Vol. 42, No. 2, August 1955 The Emerald of Sigma Pi, Vol. 42, No. 3, November 1955 The Emerald of Sigma Pi, Vol. 43, No. 3, Fall 1956