Manguerra, Ricky C. <br/><br/>
Performance of selected lettuce (Lactuca sativa L.) varieties applied with concoction solutions under low-cost hydroponic system  [manuscript] / 
Ricky C. Manguerra. 
 - Magalang, Pampanga :  Pampanga State Agricultural University,  2016. 
 - 86 pages + CD ;  28 cm.