Find-a-grave's search capabilities allow more queries than one might realize, but they don't make it very easy.

Use this to display memorials of people buried in Green River Cemetery who died in a particular year.
Enter 4-digit year and click "GO" or press "Enter".

 

Important: The default search query will show memorials with No GPS location.
Green River Cemetery does have a few memorials with GPS locations. To check for those, select "GPS" from the drop-down list.

Also: Because the findagrave website is not written very well, it will only display 20 names at a time because of this "hack".
You will be started on page 1, but the auto scroll won't work. To display other pages, enter the appropriate page number (see example below) and press "Enter".