Rudolf Carnap (1891-1970) was a German philosopher who moved to the United States. He was a member of the Vienna Circle. He advocated logical positivism.
The following provides general information about Rudolf Carnap or the Vienna Circle:
Wikipedia contributors. (2019, May 2). Rudolf Carnap. In Wikipedia, The Free Encyclopedia. Retrieved 02:57, May 26, 2019, from https://en.wikipedia.org/w/index.php?title=Rudolf_Carnap&oldid=895191747
Mauro Murzi. Rudolf Carnap (1891-1970) Internet Encyclopedia of Philosophy https://www.iep.utm.edu/carnap/
The Information Philosopher. Rudolf Carnap. http://www.informationphilosopher.com/solutions/philosophers/carnap/
Uebel, Thomas, "Vienna Circle", The Stanford Encyclopedia of Philosophy (Spring 2019 Edition), Edward N. Zalta (ed.), URL = https://plato.stanford.edu/archives/spr2019/entries/vienna-circle/.
The Collected Works of Rudolf Carnap http://rudolfcarnap.org/2016/04/05/publisher-of-cwrc/
Internet Archive https://archive.org/search.php?query=rudolf%20Carnap