Vintage Ace Science Fiction Doubles, H Series, LOT 10, 13 books

LOT 10
This lot of 13 vintage Ace Science Fiction Doubles is from a private collection, and all books are in good condition. This lot is from the H series, numbers listed below. Please see photos for titles, and authors.
H Series: 29 34 40 51 56 59 65 70 77 85 91 95 103