The morse keyboard perforator
Teleprinter no.º 10
An introduction to creed teleprinters and punched tape equipment / Creed & Company Limited
Creed printing telegraph systems : teleprinter section / Creed & Co. LTD.
No. 47 tape model teleprinter : Description and principle of Operation / Creed
The creed relay : instruction booklet No. 36 / Creed & Co. Ltd.