00578naa#a2200157#i#450# EN\ACADEMUS PUBLISHING\bibl\2891 20240502142658.4 20121125b2012####ek#y0engy0150####ca RU ANALYSIS OF THE EFFICIENCY OF RESOURCE USE RECREATIONAL AREA IN THE EASTERN GULF OF FINLAND Conference article/thesis San Francisco Academus Publishing 2012 3 с. Conference article/thesis local Общие вопросы геологии. 38.01 grnti Lazareva M. S. seacoasts.editorum.io