TY - BOOK AU - Löf,George O.G. TI - Active solar systems SN - 0262121670 AV - TJ809.95TJ810 .S68 1988 vol. 6 U1 - 697/.78 s621.47 20 PY - 1993/// CY - Cambridge, Mass. PB - MIT Press KW - Solar energy KW - Solar heating KW - Solar air conditioning N1 - Includes bibliographical references and index ER -