#[nn]

Listing of known printings per Fifteenth printing: Second printing: January 1955; Third printing: August 1956; Fourth printing: November 1956; Fifth printing: December 1956; Sixth printing: Feb. 1957; Seventh printing: October 1957; Eighth printing: November 1957; Ninth printing: March 1958; Tenth printing: August 1958; Eleventh printing: March 1959; Twelfth printing: April 1960; Thirteenth printing: August 1960; Fourteenth printing: January 1961; and Fifteenth printing: November 1961.