In 1969, if you were a tourist in the USSR, you were probably under the firm control of Intourist, the government agency to manage such things.  They gave you folders, with vouchers.  Go here, hand over a voucher.  Go there, hand over another voucher.  This is the (blue) cover for the book of hotel vouchers.  Those are of course gone now, but the cover and its notes remains.  Grade 1