41
42
Publicado 1954
“...E.U.A National Bureau of Standards...”
43
Publicado 1968
“...E. U. A. National Bureau of Standards...”
44
45
46
47
48
Publicado 1971
“...E.U.A National Bureau of Standards...”
49
50
51
52
53
54
Publicado 1977
“...E.U.A . National Bureau of Standards...”
55
Publicado 1969
“...E.U.A . National Bureau of Standards...”
56
57
58
59
60