Use http link instead of ftp

The ftp:// protocol is not recognized as a link.
pull/870/head
Edward Look 11 years ago
parent 85fe65b954
commit bc00d9ed9f
  1. 2
      free-programming-books.md

@ -1533,7 +1533,7 @@ See also [TeX](#tex)
###Scheme ###Scheme
* [An Introduction to Scheme and its Implementation](ftp://ftp.cs.utexas.edu/pub/garbage/cs345/schintro-v14/schintro_toc.html) * [An Introduction to Scheme and its Implementation](http://www.cs.rpi.edu/academics/courses/fall00/ai/scheme/reference/schintro-v14/schintro_toc.html)
* [Concrete Abstractions: An Introduction to Computer Science Using Scheme](https://gustavus.edu/+max/concrete-abstractions.html) * [Concrete Abstractions: An Introduction to Computer Science Using Scheme](https://gustavus.edu/+max/concrete-abstractions.html)
* [How to Design Programs](http://htdp.org) * [How to Design Programs](http://htdp.org)
* [Simply Scheme: Introducing Computer Science](http://www.cs.berkeley.edu/~bh/ss-toc2.html) * [Simply Scheme: Introducing Computer Science](http://www.cs.berkeley.edu/~bh/ss-toc2.html)

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