انتشارات Nist
From sundials to atomic clocks: Understanding time and frequency
James Jespersen, Jane Fitz-Randolph, 1999
Review of Building Evacuation Models
Kuligowski, Erica D.
Rockwell hardness measurement of metallic materials
Samuel R Low; National Institute of Standards, 2000
Rockwell Hardness Measurement of Metallic Mtls
S. Low, 2001
Surface Engineering Measurement Standards for Inorganic Materials
Stanley J. Dapkunas
