41
Publicado 1981
“...United States National Bureau of Standards...”
42
Publicado 1972
“...United States . National Bureau of Standards . American Dental Association...”
43
Publicado 1973
“...United States . National Bureau of Standards . Analytical Chemistry Division...”
44
45
Publicado 1953
“...United States National Bureau of Standards Computation Laboratory...”
46
Publicado 1981
“...United States National Bureau of Standards...”
47
Publicado 1965
“...United States National Bureau of Standards...”
48
Publicado 1978
“...United States . National Bureau of Standards...”