diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index 79b270de..5f447f93 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -1144,7 +1144,7 @@ independent validation is a key component of ((("bitcoins", "mining", "validatin
 [[forks]]
 === Assembling and Selecting Chains of Blocks
 
-The final part in Bitcoin's decentralized
+The final ((("bitcoins", "mining", "assembling blockchain", id="bitcoin-mining-assemble")))((("mining", "assembling blockchain", id="mining-assemble")))((("blockchain", "assembling", id="blockchain-assemble")))((("decentralized consensus", "assembling blockchain", id="decentral-consensus-assemble")))part in Bitcoin's decentralized
 consensus mechanism is the assembly of blocks into chains and the
 selection of the chain with the most Proof-of-Work.
 
@@ -1215,7 +1215,7 @@ security, you'd prefer a system with 1-minute blocks, where you could
 wait for three blocks, over a system with 10-minute blocks.  The shorter
 the time between blocks, the more miner work is wasted on accidental
 forks (in addition to other problems), so many people prefer Bitcoin's
-10-minute blocks over shorter block intervals.
+10-minute blocks over shorter block ((("bitcoins", "mining", "assembling blockchain", startref="bitcoin-mining-assemble")))((("mining", "assembling blockchain", startref="mining-assemble")))((("blockchain", "assembling", startref="blockchain-assemble")))((("decentralized consensus", "assembling blockchain", startref="decentral-consensus-assemble")))intervals.
 ====