Having worked for the private support of science for most of his life, Weaver's book U.S. Philanthropic Foundations: Their History, Structure, Management and Record (1967) is written by someone who understood intimately the workings of such institutions.
Ang pagkakaroon ng nagtrabaho para sa mga pribadong suporta ng science para sa karamihan ng kanyang buhay, Weaver ng libro US mapagkawanggawa komunidad: Ang kanilang mga History, Structure, Management at Record (1967) ay isinulat ng isang taong naiintindihan intimately ang workings ng mga institusyon.