Multiple white couloured, perfectly round, full-moon like (without spots) objects crossing the sky fromeast to west....equal sizes

Still, I can see that 1 minute!  It was 1979.  I can connect the year because of NASA's space-station "Skylab" was about to fall on earth after damage around that time.  I was following the news (through "Jugantar" news-paper,in Bengali) and curious if the parts of "Skylab" fell down at Deoghar (my town, currently within Jharkhand-state of India)!!! Lot of imaginations....it was that time.  We were returning from school ("Satsang Tapoban Vidyalay") around 3pm.  
While crossing Habua's tea-stall (jhopri-type), I and my friend Kamal clearly observed that few perfectly-round, white, glittering objects (like full moon but without any spot) are crossing the sky from east to west direction!  At first 2, then 1....then 5-7....then 2-3.....then 3-4.....total 15-20 in the span of 1 minute!  Many people around saw those white objects.  I was thinking then that those objects must be "Skylab"-part.But,when I think now - it's clear to me....those can't be "Skylab"-parts as the shape is perfectly round and all dishes are equal in size.  Yes, those were the FLYING OBJECTS still UNIDENTIFIED by me.....you may call the same as UFO !
Witness indicates that the date of the sighting is approximate.  PD