Bíró László, a golyóstoll atyja - SopronMédia
Krakatoa - Wikipedia
WCSA - On This Day - October 30, 2018 - John J Loud patents ballpoint pen in 1888 - WCSA.WORLD
Hogyan lett az embereknek tolluk? | HOLDKOMP
A History of the Ballpoint Pen - Owlcation
WCSA - On This Day - October 30, 2018 - John J Loud patents ballpoint pen in 1888 - WCSA.WORLD
Papers Past | Parliamentary Papers | Appendix to the Journals of the House of Representatives | 1888 Session I | MIDDLE ISLAND NATIVE CLAIMS (REPORT OF JOINT...
The Project Gutenberg eBook of The land of gold, by Walter Colton
Pen - Wikipedia
Biography of John J. Loud
László Bíró - Wikipedia
This Day in Patent History – On October 30, 1888, a patent for a ballpoint pen was granted to John Loud - Patent Yogi LLC
Golyóstoll – Wikipédia
Golyóstoll – Wikipédia
/https%3A%2F%2Fadmin.sopronmedia.hu%2Fuploads%2Fimport%2F62%2F1c%2Fbiro-laszlo-jozsef-golyostoll-head_6d9x.jpg "Bíró László, a golyóstoll atyja - SopronMédia")
Bíró László, a golyóstoll atyja - SopronMédia
A History of the Ballpoint Pen - Owlcation
John Jacob Loud (1844-1916) - Find a Grave Memorial
Hogyan lett az embereknek tolluk? | HOLDKOMP
John J. Loud - Wikiwand
An Oration in Memory of Abraham Lincoln | Teaching American History
Port Elizabeth of Yore: 1888 – Another Disastrous Storm - The Casual Observer
Az újságíró, aki feltalálta a golyóstollat - Inno-anno
John J. Loud - Wikipedia
John J. Loud patented the first ball... - Parker Pens India | Facebook
Golyóstoll – Wikipédia
Nyolcezer.hu - Más szemszögből
