| Website image | URL of site archived | Date archived |
Archive type |
 | https://ntrs.nasa.gov/citations/19950028364 | Sun, 23 Jul 2023 16:28:58 GMT
| Archived webpage |
 | http://web.archive.org/web/20210709181634/https://ntrs.nasa.gov/citations/19760014753 | Thu, 20 Jul 2023 03:27:44 GMT
| Archived webpage |
 | https://ntrs.nasa.gov/citations/19760014753 | Thu, 20 Jul 2023 02:45:06 GMT
| Archived webpage |
| | https://ntrs.nasa.gov/api/citations/20110015936/downloads/20110015936.pdf | Sun, 09 Oct 2022 17:21:58 GMT
| Archived webpage |
| | https://ntrs.nasa.gov/api/citations/19910002485/downloads/19910002485.pdf | Sun, 09 Oct 2022 17:19:06 GMT
| Archived webpage |
| | https://ntrs.nasa.gov/api/citations/19650009681/downloads/19650009681.pdf | Sun, 09 Oct 2022 17:18:13 GMT
| Archived webpage |
| | https://ntrs.nasa.gov/api/citations/19730009430/downloads/19730009430.pdf | Sun, 09 Oct 2022 16:31:55 GMT
| Archived webpage |
 | https://ntrs.nasa.gov/citations/20090004998 | Sat, 29 Jan 2022 03:01:19 GMT
| Archived webpage |
 | https://ntrs.nasa.gov/api/citations/20090004998/downloads/20090004998.pdf | Sat, 29 Jan 2022 03:01:05 GMT
| Archived webpage |
