ordinance : No.15 of 1890. An ordinance Relating To Fortifications And official Secrets. 

 - p.55-59, 23 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fortifications And Official Secrets.
<br/><br/><label>Universal Decimal Class. No.: </label>Vol.3 1890-1900