00621nam a2200193Ia 4500008004100000050001100041050002000052245005400072245004200126260002700168260005900195260000900254300002100263300001100284440001100295650001200306650002200318700008700340160319s9999    xx            000 0 und d  a333.79  bD489 1989 vol.1  aDevelopment and management of energy resources :   b1989 International symposium papers /  aManila, Philippines :   bPhilippine Association for the Advancement of Science,  c1989  axv, 572 pages ;   c23 cm.  vvol. 1  aBiogas.  aEnergy resources.  aPhilippine Association for the Advancement of Science (PhiLAAS), corporate author.