Marx was not at all ashamed to derive his reportage and analysis from secondary sources.
And he quotes interviews from secondary sources, many dating from the 1980's, reciting disapprovals of string theory.
"Gathering information from secondary sources felt too far removed for what I was trying to write about.
Over 11 years of the Guardian first book prize, I have seen more and more biographies of "safe" subjects, often put together from secondary sources.
Estimates depend in large part on information derived from secondary sources, but also draws upon the limited survey data that is currently available, as well as expert assessment.
"Gathering information from secondary sources felt far too removed for what I was trying to write about.
Not a single one of Epicurus' philosophical texts has survived; aside from a few fragments, his only preserved words come from two collections of sayings and three letters known only from secondary sources.
Schavan had taken several passages from secondary sources without citing them correctly, the court found.
Data were also collected from secondary sources and from current and past vaccination programs.
Qualitative techniques employing data culled mainly from secondary sources are employed.
Undoubtedly, microorganisms are a cost-effective resource for extracting and concentrating diffuse elements from secondary sources.
