00455nam a2200145Ia 4500008004100000020001400041245005400055260003400109516002000143650001500163650003200178650002100210830002600231856005200257150121s9999    xx            000 0 und d  a1908-3130  aDDC Professional Journal /h[electronic resource]  bDavao Doctors College,c2011.  aElectronic text  aEducation.  aEnvironment and Management.  aHealth Sciences.  aPhilippine E-Journals  uhttp://www.ejournals.ph/index.php?journal=DDCPJ