Book's

Perhaps Check out Alan Dean Foster, He wrote the novelisations for ALIEN, ALIENS, and ALIEN3 ( still rate that film, The extended version) In the Novelisation, If i remember rightly The broken urns are mentioned on what becomes LV-426, And the crew of the Nostromo trap the xenomorph in the airlock, when it becomes engrossed in one of the flashing becons, Ash sets an alarm off to scare it and it traps it's arm (Is that right ? Damn i will have to find the book now, And reread it)