You do not know repair broken old parquet? In general, about and is this article.
If you still decided own repair, then the first thing there meaning get information how practice mending old parquet. For it there meaning use google or yandex, or read numbers magazines "Skilled master", "Himself master" and etc., or create a topic on appropriate forum or community.
I think you do not vain spent its precious time and this article least anything will help you solve this question.