Jamaican standard  specification for Manhole Step Irons 

 - Kingston  6 Winchester Rd., P.O. Box 113, Kgn. 10  The Bureau  1974 
 - 12p.  22cm 
 - JS 30: 1974 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Standards - Jamaica
<br/><br/><label>Dewey Class. No.: </label> / J$1.00 Pam 658.562  / Ja Jam