Probe Microphone Measurements: Hearing Aid Selection and Assessment By Northern, Jerry L, Hawkins, David B., and Mueller, H. Gustav Books / Hardcover Books › Medical › General ISBN: 1879105683 / Publisher: Singular Pub Group, March 1992 Price Starting at $26.96 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Collectible - Good Signed Signed Copy Collectible - Good. Inscribed by H. Gustav Mueller on front endpage. Slightly dampstained. $26.96 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for Probe Microphone Measurements: Hearing Aid Selection and Assessment