From b34818443d49690e41b385c514af59a01c6e9ff7 Mon Sep 17 00:00:00 2001 From: isabelle-dr Date: Tue, 22 Mar 2022 19:44:52 -0400 Subject: update readme --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index bd4d0cd..272b5a5 100644 --- a/README.md +++ b/README.md @@ -5,6 +5,7 @@ This repository contains the source for the following two books: * The Definitive Guide to GTFS (2014) * The Definitive Guide to GTFS-realtime (2015) +These books have been written by Quentin Zervaas. These were originally published commercially, but have now been donated to [MobilityData](https://mobilitydata.org/). Some of the content may be outdated. You are encouraged to contribute any fixes or changes in order to keep it as up-to-date as possible. -- cgit v1.2.3