The novel Red Plenty by Francis Spufford has an account of Kruschev's visit to the US. It includes his visit to California but I can't remember if it includes the IBM visit . It's fiction, but Spufford took pains to be accurate. He writes that any words he gives to an historical character in the book were actually said by that character (although maybe not on that same occasion).

I just checked the book. No IBM visit, not even California, just Washington DC and New York. Still well worth reading.