7aaa manual - copy
Bell System Practice 503
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Bell System Practice 503-100-100 Issue 5 April 1979

 
43    Pages

Searchable  Format.

Bell System Practice 503-100-120 Issue 4 August 1978

 
27    Pages

Searchable  Format.

Bell System Practice 503-200-102 Issue 1 June 1977

 
8    Pages

Searchable  Format.

Bell System Practice 503-200-104 Issue 2 February 1975

 
7    Pages

Searchable  Format.

Bell System Practice 503-200-108 Issue 2 March 1976

 
76    Pages

Searchable  Format.

Bell System Practice 503-200-109 Issue 2 January 1976

 
4    Pages

Searchable  Format.

Bell System Practice 503-200-110 Issue 1 December 1975

 
6    Pages

Searchable  Format.

Bell System Practice 503-200-111 Issue 1 March 1977

 
10    Pages

Searchable  Format.

Bell System Practice 503-200-113 Issue 1 September 1975

 
5    Pages

Searchable  Format.

Bell System Practice 503-200-115 Issue 2 July 1980

 
8   Pages

Searchable  Format.