Operator's and organizational maintenance manual : intercommunication stations LS-147A/FI, LS-147B/FI, LS-147C/FI, and LS-147D/FI.

"5 June 1961."

Intercommunication stations, LS-200/FI, LS-201/FI, LS-202/FI, and LS-125B/FI.

"August 1955."

DS, GS, and depot maintenance manual : control, intercommunication set C-1611D/AIC and discriminator, discrete signal MD-736/A.

"May 1970."

Field and depot maintenance manual : intercommunication stations LS-147A/FI, LS-147B/FI, LS-147C/FI, and LS-147D/FI.

"20 July 1961."

Operator's and organizational maintenance manual : intercommunication stations LS-147A/FI, LS-147B/FI, LS-147C/FI, and LS-147D/FI.

"5 June 1961."

Organizational maintenance manual : control, intercommunication set C-1611D/AIC and discriminator, discrete signal MD-736/A.

"January 1970."