Back in the 1970s (based on the cover art), three companies decided to come together (merge or acquire): Knowledge Aid, Filmstrip House and Moreland-Latchford. They formed:
I have to say, that was just the most 1970s cover art ever. The colors, the rounded shapes, the abstract plant in the middle of it all and the fontface.
This particular legal sized box held filmstrips about:
The immune system.
Doing some cursory research on these firms turns up the following:
This name has been taken over by a charity, so it’s almost impossible to find out anything about the previous one of that name online.
WorldCat has a few, like these.
If anyone has any information or stories about these firms I would be glad to hear them.