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- catalog contributor b8051319.
- catalog created "[n.d.]".
- catalog date " ".
- catalog date "[n.d.]".
- catalog dateCopyrighted "[n.d.]".
- catalog extent "[2] p.".
- catalog issued " ".
- catalog issued "[n.d.]".
- catalog language "eng".
- catalog publisher "Philadelphia, James G. Biddle".
- catalog subject "X-rays Equipment and supplies.".
- catalog title "Improved Benoist penetrometer. The Benoist penetrometer is an apparatus ... which enables the X-ray worker to determine quantitatively in terms of a reference standard how "hard' or how "soft" are the rays which he is getting from his tube ...".
- catalog type "text".