Merge bibliographies

texfiles/example.bib

@@ -1,8 +1,17 @@
-% Encoding: UTF-8
+%% This BibTeX bibliography file was created using BibDesk.
+%% http://bibdesk.sourceforge.net/
+
+
+%% Created for ☞ at 2016-11-23 18:00:49 +0100
+
+
+%% Saved with string encoding Unicode (UTF-8)
+
+
+
 @book{Piaget_1985,
 	Address = {Chicago},
 	Author = {Piaget, Jean},
-        Edition = {8},
 	Publisher = {University of Chicago Press},
 	Title = {The Equilibration of Cognitive Structures},
 	Year = {1985}}
@@ -13,18 +22,18 @@ @booklet{Kaulbach_1960
 	Publisher = {Kölner Universitäts-Verlag},
 	Series = {Kant-Studien. Ergänzungshefte},
 	Title = {Die Metaphysik des Raumes bei Leibniz und Kant},
-        Keywords = {Brentjes, Katjes},
 	Volume = {79},
 	Year = {1960}}
 
-@report{walkowski_digital_2016,
+@techreport{walkowski_digital_2016,
 	Author = {Walkowski, Niels-Oliver},
-	Date = {2016},
+	Year = {2016},
 	Institution = {Niedersächsische Staats- und Universitätsbibliothek Göttingen},
 	Location = {Göttingen},
 	Number = {17},
-	Title = {Digital Publications beyond Digital Communication / Niels-Oliver Walkowski},
-	Url = {http://nbn-resolving.de/urn:nbn:de:gbv:7-dariah-2016-3-4}}
+	Title = {Digital Publications beyond Digital Communication},
+	Url = {http://nbn-resolving.de/urn:nbn:de:gbv:7-dariah-2016-3-4},
+	Bdsk-Url-1 = {http://nbn-resolving.de/urn:nbn:de:gbv:7-dariah-2016-3-4}}
 
 @phdthesis{Carvalho2012,
 	Author = {Carvalho, {Teresa Nobre de}},
@@ -40,7 +49,8 @@ @misc{Gert2011
 	Type = {Online Database},
 	Url = {http://plato.stanford.edu/archives/fall2012/entries/morality-definition/},
 	Urldate = {2014-10-14},
-	Year = {2011 [2002]}}
+	Year = {2011 [2002]},
+	Bdsk-Url-1 = {http://plato.stanford.edu/archives/fall2012/entries/morality-definition/}}
 
 @incollection{Asper_2009,
 	Address = {Oxford},
@@ -52,17 +62,15 @@ @incollection{Asper_2009
 	Title = {The two cultures of mathematics in ancient Greece},
 	Year = {2009}}
 
-@InProceedings{Gamba_2008,
-  author    = {Gamba, Enrico and Andersen, Kirsti},
-  title     = {{M}onte, {G}uidobaldo, {M}archese {D}el},
-  booktitle = {Complete Dictionary of Scientific Biography},
-  year      = {2008},
-  volume    = {23},
-  publisher = {Charles Scribner's Sons},
-  pages     = {174-178},
-  address   = {Detroit},
-  keywords  = {DBB},
-}
+@inproceedings{Gamba_2008,
+	Address = {Detroit},
+	Author = {Gamba, Enrico and Andersen, Kirsti},
+	Booktitle = {Complete Dictionary of Scientific Biography. Vol. 23},
+	Keywords = {DBB},
+	Pages = {174-178},
+	Publisher = {Charles Scribner's Sons},
+	Title = {{M}onte, {G}uidobaldo, {M}archese {D}el},
+	Year = {2008}}
 
 @article{Hsu_1993,
 	Author = {Hsu, Mei-ling},
@@ -78,7 +86,7 @@ @newspaper{wenk_riesenschweinerei_2016
 	Title = {Eine Riesenschweinerei - „Didi \& Stulle“ komplett},
 	Url = {http://www.tagesspiegel.de/kultur/comics/berliner-comic-klassiker-eine-riesenschweinerei-didi-und-stulle-komplett/14742676.html},
 	Urldate = {2016-11-23},
-        	Year = {2016}}
+	Bdsk-Url-1 = {http://www.tagesspiegel.de/kultur/comics/berliner-comic-klassiker-eine-riesenschweinerei-didi-und-stulle-komplett/14742676.html}}
 
 @article{Maccagni_1967b,
 	Author = {Maccagni, Carlo},
@@ -103,7 +111,6 @@ @book{Maccagni_1967a
 @article{test,
 	Author = {Thoden, Klaus},
 	Journal = {Test},
-        Keywords = {Zwei, anders},
 	Pages = {15-20},
 	Title = {This should not appear, because it is not cited},
 	Volume = {21},