TY - DATA AU - Lawson,Ashley J. ED - Library of Congress. TI - A brief history of U.S. electricity portfolio standard proposals T2 - IF PY - 2020///- CY - [Washington, D.C.] PB - Congressional Research Service KW - Electricity KW - History N1 - The CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141; earliest version dated 2019; GPO Cataloging Record Distribution Program (CRDP); Includes bibliographical references UR - https://purl.fdlp.gov/GPO/gpo135721 ER -