D 6456 - 10 (2018)
๐ Scientific
๐
2018
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
The Engineer January 03-10, 1980: <a href="https://archive.org/search.php?query=sim_pubid%3A1202%20AND%20volume%3A250" rel="nofollow">Volume 250</a>, Issue 6458-6459.<br />Digitized from <a href="https://archive.org/details/sim_raw_scan_IA1518515-05/page/n1286" rel="nofollow">IA1518515-05</a>.<br />
The Engineer December 20-27, 1979: <a href="https://archive.org/search.php?query=sim_pubid%3A1202%20AND%20volume%3A249" rel="nofollow">Volume 249</a>, Issue 6456-6457.<br />Digitized from <a href="https://archive.org/details/sim_raw_scan_IA1518515-05/page/n1273" rel="nofollow">IA1518515-05</a>.<br /