1951-52 Grosse Pointe, MI. Three saucer shaped objects entering into a large oval shapped object.

I am now 61 yrs. old. 
In around 1950-51 in spring or summer either 1950-1951  My home at that time was located in Grosse Pointe Park, MI.  
I saw an oval shaped object about the height of on airplane above where I was swinging on our home playground.  
I called for my mother and asked what it was. We watched a few minutes wittnessing one oval object while three saucer shaped objects were approaching the oval object from below it. 
It appeared that the 3 saucers were entering from below. 
We watched them enter. 
My mother called the police and it was written up in our local newspaper.
I thought you needed to know this information even though I was so young. I hope that it is helpful.
Witness elects to remain totally anonymous;  provides no contact information.  We recommend that the witness go to the newspaper, and attempt to determine the exact date of the event from the article he alludes to above.  If anyone else would care to do that in Grosse Pointe, that would be helpful.  We will correct the date above.  PD