There is a questionnaire developed and published in 1990. Translated into multiple languages since then. I am not able to understand whether it is a copyrighted or free domain. No clear information is available on the net. 1) In the absence of copyright information, can I assume it is open domain and use it? 2)To use the translated version, do I need formal permission from people who have translated it?

3) Is there a reliable source on the internet where consolidated information about copyright status and contact details for obtaining permission can be found?