-in as follows:


``` r
#pkg_df = readr::read_csv("extdata/package_list.csv")
```

Other citations are stored online using Zotero.

If you would like to add to the references, please use Zotero, join the [open group](https://www.zotero.org/groups/418217/energy-and-transport) add your citation to the open [geocompr library](https://www.zotero.org/groups/418217/energy-and-transport/items/collectionKey/9K6FRP6N).

We use the following citation key format:

```
[auth:lower]_[veryshorttitle:lower]_[year]
```

Th