1962 KGB Russian USSR book vintage Top secret Northern Yakutia Sakha

  
The work of the Arctic and Antarctic Research Institute of the Main Directorate of the Northern Sea Route of the Ministry of the Navy of the USSR. Publishing house "Sea transport" Leningrad 1962.

The main feature of this book is the presence of the signature stamp " Top secret" (see the third photo) there is also a seal of the secret library of the research institute, this is the first time I see a book with such a degree of secrecy, given that the price of this book is on the back cover, it can be assumed that the degree of secrecy was assigned after the publication of the book contains statistical materials on Northern Yakutia. Including those related to the social and economic life of indigenous peoples. You can ask additional questions.