Specification for safety requirements in rotary milking parlours/ 
British Standards Institution. 
 - 7 pages ;  33cm. 
 - British standard ;  BS 5539 : 1978 .
 - British standard ;  BS 5539 : 1978 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Milking parlors --Standards--Great Britain.