diff --git a/gerald-sussman.md b/gerald-sussman.md
new file mode 100644
index 000000000..a6d6ce1c4
--- /dev/null
+++ b/gerald-sussman.md
@@ -0,0 +1,13 @@
+# Gerald Sussman
+
+- A [[person]].
+  - [[computer scientist]] [[teacher]] [[writer]]
+- [[book]] [[structure and interpretation of computer programs]]
+- [[book]] [[structure and interpretation of classical mechanics]]
+
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[person]: person "Person"
+[writer]: writer "Writer"
+[book]: book "Book"
+[//end]: # "Autogenerated link references"
\ No newline at end of file
diff --git a/journal/2021-02-21.md b/journal/2021-02-21.md
index d6c15d22a..a0477937c 100644
--- a/journal/2021-02-21.md
+++ b/journal/2021-02-21.md
@@ -11,10 +11,13 @@
 - [[ranking]]
 - [[transitive go links]]
 - [[daniel slutsky]]
+  - [[sicmutils]]
+  - [[sicm]]
 - [[photopia]]
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
 [fedstoa]: ../fedstoa "Fedstoa"
 [ranking]: ../ranking "Ranking"
+[sicm]: ../sicm "Sicm"
 [photopia]: ../photopia "Photopia"
 [//end]: # "Autogenerated link references"
\ No newline at end of file
diff --git a/sicm.md b/sicm.md
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--- /dev/null
+++ b/sicm.md
@@ -0,0 +1,4 @@
+# Sicm
+
+- [[pull]] [[structure and interpretation of classical mechanics]]
+
diff --git a/structure-and-interpretation-of-classical-mechanics.md b/structure-and-interpretation-of-classical-mechanics.md
new file mode 100644
index 000000000..231e20ba0
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+++ b/structure-and-interpretation-of-classical-mechanics.md
@@ -0,0 +1,12 @@
+# Structure and Interpretation of Classical Mechanics
+
+- a [[book]]
+  - by [[gerald sussman]] and [[jack wisdom]]
+- [[go]] https://en.wikipedia.org/wiki/Structure_and_Interpretation_of_Classical_Mechanics
+- See also [[structure and interpretation of computer programs]].
+
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[book]: book "Book"
+[go]: go "Go"
+[//end]: # "Autogenerated link references"
\ No newline at end of file