Famous SOS calls -LRB- used CQD as well -RRB- HMHS Britannic References `` The Wireless Telegraph Conference '' , The Electrician , November NUMBER@1 , NUMBER@2 , pages NUMBER@3 -- NUMBER@4 , NUMBER@5 .

References `` The Wireless Telegraph Conference '' , The Electrician , November NUMBER@1 , NUMBER@2 , pages NUMBER@3 -- NUMBER@4 , NUMBER@5 .
