I've been trying for days to figure this out on my own. My head hurts. Please help me.

What I need:

I need the following in a formula on a separate sheet from "Article List":

Count the number of line entries on sheet "Article List" that have both of the following:

- in B4:B10000, text = "Unassigned Pre-Publish"
- in D4:D10000, Month = "4"


What I have:

I was able to count the number of entries with "Unassigned Pre-Publish" by using:
=COUNTIF('Article List'!$B$4:$B$999,"Unassigned Pre-Publish")

I was able to count the number of entries with the specific month by using:
=SUMPRODUCT(--(MONTH('Article List'!D4:D10000)=4))

But I cannot figure out how to get entries that meet both criteria.

I basically need a breakdown of how many entries are marked as "<specific text>" for the month of <month number>. I have a bunch of other variations I need to filter. So once I have this basic formula then I can start to apply it with my other criteria in all the different cells as needed.