41
42
43
Publicado 1968
“...E. U. A. National Bureau of Standards...”
44
45
46
47
Publicado 1971
“...E.U.A National Bureau of Standards...”
48
Publicado 1956
“...E.U.A National Bureau of Standards...”
49
50
51
52
53
Publicado 1973
“...E.U.A National Bureau of Standards...”
54
55
56
57
58
Publicado 1970
“...E.U.A National Bureau of Standards...”
59
60