Sangatanan, Pedro D. <br/><br/>Azolla as Fertilizer and Feed  -- Metro Manila, Philippines:  Rex Book Store,  1984. <br/>iv, 48 p.:  ill,;  23 cm. <br/><br/> includes bibliographical references. <br/><br/><label>Dewey Class. No.: </label>GSL Res 630 Sa581 1984