According to SIS and Andrew , the book is based on the handwritten notes of KGB archivist defector Vasili Mitrokhin .
Salvador Allende is mentioned in a book written by the official historian of the British Intelligence MI5 Christopher Andrew .
According to SIS and Christopher Andrew , the book is based on the handwritten notes of KGB archivist defector Vasili Mitrokhin .
Salvador Allende is mentioned in a book written by the official historian of the British Intelligence MI5 Christopher Andrew .