00339nas a2200133   4500000000100000000000100001008004100002100002100043700002000064700001800084245008500102300001100187490000700198       2009                            d1 aBoyan Mednikarov1 aNikola Stoyanov1 aKalin Kalinov00aChallenges to Education and Training in the Field of Harbour Protection Security  a97-1020 v10