They Fight For Poland
Page 50
And on this very morning of September 17th the columns of Soviet tanks were speeding into the undefended eastern borderlands.
Page 54
But on the same day General Sosnkowski received by air a communication from the Supreme Command, dated September 17th, reporting that Bolshevik forces had crossed the frontier, and ordering him to retreat to the south and retire across the Hungarian frontier.
Page 100
To-day the German radio announces that Soviet troops entered Poland on September 17th.
Page 176
September 17th, we learned that Soviet Russia had stabbed Poland in the back
Page 273
After the Russians invaded Poland from the East on September 17th all the pilots of the Polish Air Force were ordered to fly their machines to Rumania, then still an ally of Poland.