The Saline County Genweb site states that Dallas Cemetery is also known as Brothers Family Cemetery, located in Carrier Mills Township, Section 29, SE 1/4 NW 1/4. Two ways you should be able to get more specific directions are:
1. Go to the URL below. This map is for sale, but if you click on the + you can enlarge the township map and see where Section 29 is located (upper left of township). It shows one road running through it, Haulage Road http://www.historicmapworks.com/Map/US/296018/Map+Image+004/...
2. There are two interments listed in Brothers Family Cemetery on Find-a-Grave. There is also a photograph of the cemetery sign. There is not a map, but if you email the person who uploaded the cemetery sign photograph, he should be able to give you detailed instructions on how to get there. The photograph credit is for David Wrzesinski - Smith. Click on his name to send an email to him.
I hope you find it.