diff --git a/dmu23/dmu23_AKARI-SEP/Akari-SEP-survey-codes.txt b/dmu23/dmu23_AKARI-SEP/Akari-SEP-survey-codes.txt
new file mode 100644
index 00000000..7c9ed57d
--- /dev/null
+++ b/dmu23/dmu23_AKARI-SEP/Akari-SEP-survey-codes.txt
@@ -0,0 +1,9 @@
+1 - Sedgwich et al. (2017) - via Vaccari catalogue
+2 - 6dF
+4 - 2MRS
+8 - IRASpscz
+16 - Chincarini et al. (1984)
+32 - Dressler et al. (1988)
+64 - Loveday et al. (1996)
+128 - Maza et al. (1995)
+256 - Tully et al. (2008)
diff --git a/dmu23/dmu23_AKARI-SEP/changelog.md b/dmu23/dmu23_AKARI-SEP/changelog.md
new file mode 100644
index 00000000..c88a352d
--- /dev/null
+++ b/dmu23/dmu23_AKARI-SEP/changelog.md
@@ -0,0 +1,5 @@
+## 20180108: Initial ingestion
+
+File received from Matt: `Akari-SEP-specz-v2.csv`.
+
+
diff --git a/dmu23/dmu23_HDF-N/HDF-N-survey.txt b/dmu23/dmu23_HDF-N/HDF-N-survey.txt
new file mode 100644
index 00000000..1cb82f1f
--- /dev/null
+++ b/dmu23/dmu23_HDF-N/HDF-N-survey.txt
@@ -0,0 +1,16 @@
+1 - SDSS DR14
+2 - DEEP3
+4 - 3DHST
+8 - Steidel et al. (2003)
+16 - Liu et al. (1999)
+32 - Team Keck Tresury Redshift - Wirth et al. (2004)
+64 - Reddy et al. (2006)
+128 - Cohen et al. (2000), and included references (see Table 1)
+256 - Chapman et al. (2004)
+512 - Chapman et al. (2005)
+1024 - Swinbank et al. (2004)
+2048 - Dawson et al. (2001)
+4096 - Pope et al. (2008)
+8192 - Barger et al. (2003) - sources 1, 3, 7, 12 and 14 (see their table 6)
+16384 - Vanden Berk et al. (2000)
+32768 - Cowie et al. (2004)
diff --git a/dmu23/dmu23_HDF-N/changelog.md b/dmu23/dmu23_HDF-N/changelog.md
new file mode 100644
index 00000000..c7f233d7
--- /dev/null
+++ b/dmu23/dmu23_HDF-N/changelog.md
@@ -0,0 +1,3 @@
+## 20180108: Initial ingestion
+
+File received from Matt: `HDF-N-specz-v2.csv`.
diff --git a/dmu23/dmu23_SA13/SA13-survey-codes.csv b/dmu23/dmu23_SA13/SA13-survey-codes.csv
new file mode 100644
index 00000000..925441e1
--- /dev/null
+++ b/dmu23/dmu23_SA13/SA13-survey-codes.csv
@@ -0,0 +1,4 @@
+1 - SDSS DR14
+2 - Chapman et al. (2005)
+4 - Smail et al. (2004)
+8 - Cowie et al. (1996)
diff --git a/dmu23/dmu23_SA13/changelog.md b/dmu23/dmu23_SA13/changelog.md
new file mode 100644
index 00000000..cb269375
--- /dev/null
+++ b/dmu23/dmu23_SA13/changelog.md
@@ -0,0 +1,3 @@
+## 20180108: Initial ingestion
+
+File received from Matt: `SA13-specz-v2.csv`.
diff --git a/dmu23/dmu23_XMM-13hr/XMM-13hr-survey-codes.txt b/dmu23/dmu23_XMM-13hr/XMM-13hr-survey-codes.txt
new file mode 100644
index 00000000..a74d559c
--- /dev/null
+++ b/dmu23/dmu23_XMM-13hr/XMM-13hr-survey-codes.txt
@@ -0,0 +1,4 @@
+1 - SDSS DR14
+2 - Page et al. (2006)
+4 - Jeltema et al. (2007)
+8 - MCXC catalogue, Piffaretti et al. (2011)
diff --git a/dmu23/dmu23_XMM-13hr/changelog.md b/dmu23/dmu23_XMM-13hr/changelog.md
new file mode 100644
index 00000000..5fc20932
--- /dev/null
+++ b/dmu23/dmu23_XMM-13hr/changelog.md
@@ -0,0 +1,3 @@
+## 20180108: Initial ingestion
+
+File received from Matt: `XMM-13hr-specz-v2.csv`.