diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index 99558473..e6afe4dd 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -1492,7 +1492,7 @@ as nested P2WSH.
 
 ===== Nested pay to witness public key hash
 
-The first((("P2WPKH (pay to witness public key hash)", "nesting", id="p2wpkh-nest")))((("nesting", "P2WPKH (pay to witness public key hash)", id="nest-p2wpkh"))) form of output script we will examine is nested P2WPKH. This
+The first((("P2WPKH (pay to witness public key hash)", "nesting", id="p2wpkh-nest")))((("nesting", "P2WPKH (pay to witness public key hash)", id="nest-p2wpkh-ch7"))) form of output script we will examine is nested P2WPKH. This
 is a pay to witness public key hash witness program, embedded inside a
 pay to script hash script, so that a wallet that is
 not aware of segwit can pay the output script.
@@ -1525,11 +1525,11 @@ OP_HASH160 3e0547268b3b19288b3adef9719ec8659f4b2b0b OP_EQUAL
 ----
 
 Even though Alice's wallet has no support for segwit, the payment it
-creates can be spent by Bob with a segwit ((("P2WPKH (pay to witness public key hash)", "nesting", startref="p2wpkh-nest")))((("nesting", "P2WPKH (pay to witness public key hash)", startref="nest-p2wpkh")))transaction.
+creates can be spent by Bob with a segwit ((("P2WPKH (pay to witness public key hash)", "nesting", startref="p2wpkh-nest")))((("nesting", "P2WPKH (pay to witness public key hash)", startref="nest-p2wpkh-ch7")))transaction.
 
 ===== Nested pay to witness script hash
 
-Similarly, ((("P2WSH (pay to witness script hash)", "nesting", id="p2wsh-nest")))((("nesting", "P2WSH (pay to witness script hash)", id="nest-p2wpkh")))a P2WSH witness program for a multisig script or other
+Similarly, ((("P2WSH (pay to witness script hash)", "nesting", id="p2wsh-nest")))((("nesting", "P2WSH (pay to witness script hash)", id="nest-p2wsh-ch7")))a P2WSH witness program for a multisig script or other
 complicated script can be embedded inside a P2SH script and address,
 making it possible for any wallet to make payments that are segwit
 compatible.
@@ -1577,7 +1577,7 @@ OP_HASH160 86762607e8fe87c0c37740cddee880988b9455b2 OP_EQUAL
 ----
 
 Mohammed's company can then construct segwit transactions to spend these
-payments, taking advantage of segwit features including ((("scripts", "examples of", startref="script-example-complex")))((("scripts", "segregated witness", startref="script-segwit")))((("segregated witness (segwit)", "scripts and", startref="segwit-script")))((("scripts", "segregated witness", "upgrading to", startref="script-segwit-upgrade")))((("segregated witness (segwit)", "scripts and", "upgrading to", startref="segwit-script-upgrade")))((("upgrading to segregated witness", startref="upgrade-segwit")))((("P2WSH (pay to witness script hash)", "nesting", startref="p2wsh-nest")))((("nesting", "P2WSH (pay to witness script hash)", startref="nest-p2wpkh")))lower
+payments, taking advantage of segwit features including ((("scripts", "examples of", startref="script-example-complex")))((("scripts", "segregated witness", startref="script-segwit")))((("segregated witness (segwit)", "scripts and", startref="segwit-script")))((("scripts", "segregated witness", "upgrading to", startref="script-segwit-upgrade")))((("segregated witness (segwit)", "scripts and", "upgrading to", startref="segwit-script-upgrade")))((("upgrading to segregated witness", startref="upgrade-segwit")))((("P2WSH (pay to witness script hash)", "nesting", startref="p2wsh-nest")))((("nesting", "P2WSH (pay to witness script hash)", startref="nest-p2wsh-ch7")))lower
 transaction fees.
 
 [[mast]]