00620nam a2200217Ia 4500 150520s9999 xx 000 0 und d HF 5410 .R144 2015 Ragos, Patrick Jayson S. Purchase order system for solar and wind power incorporation / Patricia Jayson S. Ragos. Las Piñas, Philippines : SISC, 2015. 94 pages : illustrations ; 28 cm. Includes bibliographical references and appendices. Purchasing Management System 284066 284066