R063 Aca J Academia Alemana de Ciencias, Berlin Jahrbuch der Deutschen Akademie der Wissenschaften zu Berlin, I960 Berlin, Akademie Verlag, 1961 893 p. 25 cm. <a id= "rdfa" about="http://bnjm.sld.cu/cgi-bin/item.py?idficha=bcuhcgrlyfof0010183" property = "oa:link" href="http://www.worldcat.org/oclc/ 643474674 ">WorldCat</a>