Calculations

The  is a quest item featured in S.T.A.L.K.E.R.: Lost Alpha as a target item during the Documents Thread.

"yan_docs_part2_des"

- Inventory description

Gameplay

 * Located in the Yantar underground near to the (sealed) Bloodsucker Lair.

Trivia

 * Referred to in the gamefiles as "yan_docs_part2_name".
 * All of these documents have a base cost value that is irrelevant (unable to trade them away)