Dogger training | The hand and whistle signals every dogger and crane operator needs to know! Need to study up on your dogger and crane comms before your assessment??... | By SWQ
A man riding a crane and blowing a whistle - Stock Illustration [77263784] - PIXTA
The Wind Whistling in the Cranes by Lídia Jorge, Margaret Jull Costa - translator, Annie McDermott - translator - Audiobook - Audible.com