1. DOCUMENT - "NOBLE EFFORTS" - Soviet Power
Next to the elevator, after climbing up.
2. DOCUMENT - "MISSING MEN" - Soviet Power
In the corridor on the floor, where the base camp is.
3. DOCUMENT - "BROKEN TRACKS" - Soviet Power
In the "basement". Reach the area by climbing down the "well" in the big room. The one with the ice wall. There is a little area in the ice wall corridor. The document is on a table.
4. DOCUMENT - "RESISTANCE" - Soviet Power
On a table in the big room with the well.
5. DOCUMENT - "RADIO SILENCE" - Soviet Power
On top of some boxes.