diff --git a/draft-ietf-opsawg-pcaplinktype.md b/draft-ietf-opsawg-pcaplinktype.md
index 5d74328..6691c26 100644
--- a/draft-ietf-opsawg-pcaplinktype.md
+++ b/draft-ietf-opsawg-pcaplinktype.md
@@ -52,6 +52,15 @@ informative:
       Node (MS-SGSN) Logical Link Control (LLC) layer specification
     refcontent: 3GPP TS 04.64
 
+  AIM-628:
+    author:
+    - fullname: David A. Moon
+      org: MIT Artificial Intelligence Laboratory
+    title: Chaosnet
+    date: June 1981
+    refcontent: MIT A.I. Memo No. 628
+    target: http://www.bitsavers.org/pdf/mit/ai/AIM-628_chaosnet.pdf
+
   ASHRAE-135:
     title: >
       BACnet(TM): A Data Communication Protocol for Building Automation
diff --git a/linktypes.csv b/linktypes.csv
index ad9cd58..702a965 100644
--- a/linktypes.csv
+++ b/linktypes.csv
@@ -3,7 +3,7 @@
 |LINKTYPE_EXP_ETHERNET|2|Xerox experimental 3Mb Ethernet|
 |LINKTYPE_AX25|3|AX.25 packet|{{AX.25}}
 |LINKTYPE_PRONET|4|Reserved for PRONET|
-|LINKTYPE_CHAOS|5|Reserved for MIT CHAOSNET|
+|LINKTYPE_CHAOS|5|Reserved for MIT Chaosnet|{{AIM-628}}
 |LINKTYPE_IEEE802_5|6|IEEE 802.5 Token Ring|
 |LINKTYPE_ARCNET_BSD|7|ARCNET Data Packets with BSD encapsulation|
 |LINKTYPE_SLIP|8|SLIP|{{LINKTYPE_SLIP}}
@@ -215,4 +215,4 @@
 |LINKTYPE_SILABS_DEBUG_CHANNEL|298|Silicon Labs debug channel protocol, as described in https://github.com/SiliconLabs/java_packet_trace_library/blob/master/doc/debug-channel.md|
 |LINKTYPE_FIRA_UCI|299|Ultra-wideband (UWB) controller interface protocol (UCI)|{{LINKTYPE_FIRA_UCI}}
 |LINKTYPE_MDB|300|MDB (Multi-Drop Bus) protocol between a vending machine controller and peripherals inside the vending machine, with the message format specified by https://www.kaiser.cx/pcap-mdb.html the PCAP format for MDB specification|
-|LINKTYPE_DECT_NR|301|DECT-2020 New Radio (NR) MAC layer specified in https://www.etsi.org/committee/1394-dect ETSI TS 103 636-4. The Physical Header Field is always encoded using 80 bits (10 bytes). Broadcast transmissions using 40 bits (5 bytes) is padded with 40 zero bits (5 bytes). When padding is used the Receiver Identity value 0x0000 (reserved address) is used to detect broadcast transmissions|
\ No newline at end of file
+|LINKTYPE_DECT_NR|301|DECT-2020 New Radio (NR) MAC layer specified in https://www.etsi.org/committee/1394-dect ETSI TS 103 636-4. The Physical Header Field is always encoded using 80 bits (10 bytes). Broadcast transmissions using 40 bits (5 bytes) is padded with 40 zero bits (5 bytes). When padding is used the Receiver Identity value 0x0000 (reserved address) is used to detect broadcast transmissions|