POPULAR SCIENCE Vol. 206, No.5 168 page magazine, Times Mirror Magazines, Inc., May 1975 The magazine is complete and in GOOD condition with 10 cents written on the cover with a black marker Mint (MT) Nearly perfect in every way. Near Mint (NM) Nearly perfect with only minor imperfections such as subtle bindery/printing defects. Very Fine (VF) Excellent copy with outstanding eye appeal; limited accumulation of bindery/printing defects, surface wear, and minor spine creasing. Fine (FN) Above average copy that shows minor wear but is still relatively flat and clean with no significant creasing or other serious defects. Very Good (VG) The average used magazine with moderate to significant wear. Good (GD) Shows significant wear. Fair (FR) Shows heavy wear. Poor (PR) Little or no collector value.