The Emerald of Sigma Pi, Vol. 7, No. 4, January 1921 The Emerald of Sigma Pi, Vol. 8, No. 1, April 1921 The Emerald of Sigma Pi, Vol. 8, No. 2, July 1921 The Emerald of Sigma Pi, Vol. 8, No. 3, October 1921 The Emerald of Sigma Pi, Vol. 8, No. 4, January 1922 The Emerald of Sigma Pi, Vol. 9, No. 1, April 1922 The Emerald of Sigma Pi, Vol. 9, No. 2, July 1922 The Emerald of Sigma Pi, Vol. 9, No. 3, October 1922 The Emerald of Sigma Pi, Vol. 9, No. 4, January 1923 The Emerald of Sigma Pi, Vol. 10, No. 1, April 1923 The Emerald of Sigma Pi, Vol. 10, No. 2, July 1923 The Emerald of Sigma Pi, Vol. 10, No. 3, November 1923 The Emerald of Sigma Pi, Vol. 10, No. 4, January 1924 The Emerald of Sigma Pi, Vol. 11, No. 1, April 1924 The Emerald of Sigma Pi, Vol. 11, No. 2, July 1924 The Emerald of Sigma Pi, Vol. 11, No. 3, November 1924 The Emerald of Sigma Pi, Vol. 11, No. 4, January 1925 The Emerald of Sigma Pi, Vol. 12, No. 1, April 1925 The Emerald of Sigma Pi, Vol. 12, No. 2, July 1925 The Emerald of Sigma Pi, Vol. 12, No. 3, November 1925