Keiper, F. (1924). Pioneer inventions and pioneer patents: A lecture on patent law delivered to the senior engineering students of Purdue University of the classes of '22, '23 and '24 and previous classes (2nd ed.). Pioneer Pub. Co.
Chicago-Zitierstil (17. Ausg.)Keiper, Frank. Pioneer Inventions and Pioneer Patents: A Lecture on Patent Law Delivered to the Senior Engineering Students of Purdue University of the Classes of '22, '23 and '24 and Previous Classes. 2nd ed. Rochester, N.Y: Pioneer Pub. Co, 1924.
MLA-Zitierstil (9. Ausg.)Keiper, Frank. Pioneer Inventions and Pioneer Patents: A Lecture on Patent Law Delivered to the Senior Engineering Students of Purdue University of the Classes of '22, '23 and '24 and Previous Classes. 2nd ed. Pioneer Pub. Co, 1924.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.