Find documents in the laboratory X-16

The documents from X-18 hinted at that Brain Scorcher might be man-made. The answer to that is in the X-16, another underground laboratory at Yantar.
== Walkthrough ==
This task is a tracking entry in the PDA journal. The actual process is described in Meet Kruglov and subsequent articles. You might want to know beforehand that taking an RPG-7 with one shot and some grenades to the Wild Territory will make saving Kruglov easier.
After bringing the documents, don't forget to talk to Voronin as Barkeep tells you.
== Notes ==
* After this quest, you can give Barkeep the flash drive you got for Escort Kruglov to Yantar. You'll receive the transition to Army Warehouses and 10000RU.
== Bugs ==
* Make sure to complete Find the Hiding of Strelok's group before descending into X-16, or you'll softlock your game. This is an old bug from Shadow of Chernobyl.
* While in X-16, make sure to listen to Ghost's audio message in full without switching locations, or Guide might not spawn. This is an old bug from Shadow of Chernobyl.