000 00258nam a2200109Ia 4500
008 201216s9999 xx 000 0 und d
100 _aHMSO
245 0 _aCertificates of Competency in the Merchant Navy
260 _aLondon
_bHMSO
300 _a83
942 _cBK
999 _c6859
_d6859