diff --git a/theorems/T000906.md b/theorems/T000906.md
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+---
+uid: T000906
+if:
+  and:
+  - P000027: true
+  - P000005 : true
+then:
+  P000053: true
+refs:
+- zb: "1052.54001"
+  name: General Topology (Willard)
+---
+
+This is *Urysohn's metrization theorem* (Theorem 23.1 in {{zb:1052.54001}}).