D 6591 - 19
๐ Scientific
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
The Engineer August 12-19, 1982: <a href="https://archive.org/search.php?query=sim_pubid%3A1202%20AND%20volume%3A255" rel="nofollow">Volume 255</a>, Issue 6594-6595.<br />Digitized from <a href="https://archive.org/details/sim_raw_scan_IA1518515-05/page/n2069" rel="nofollow">IA1518515-05</a>.<br />P