ISBN-13: 9781032076508 / Angielski / Twarda / 2021 / 172 str.
ISBN-13: 9781032076508 / Angielski / Twarda / 2021 / 172 str.
Originally published in 1972 and ahead of its time in many respects this book was the first to take a constructive approach to the problems facing the human race in the 20th Century.