Notes:
2nd Printing stated in indicia and has only 75 cent US price and no barcode. The cover of the 3rd Printing looks exactly the same as the 2nd Printing but is marked as "Third Printing" in the indicia.
Notes:
Letters of comment from Gene Popa, Charles D. Brown, A. Jaye Williams, Synthetic Poultry, Charlie Harris, Charles Rhett Anderson, The Little White Boy and Malcolm Bourne. Includes "From the Den" column.