00658nam a22001577a 450000500170000000800410001704000240005805000240008210000270010624501350013326000190026830000390028750000250032665000480035170001010039920230427155440.0230422b        |||||||| |||| 00| 0 eng d  6HSLRCaHSLRCcHSLRC  aTS 1120.5bI52 2019  aLibo-on, John Patrick   aProducing a hydrophopic envelope from the used paper of the Senior High School Department of Our Lady of Perpetual Succor College.  aMarikina City.  avi, 75pages; billustration;c28cm  aIncludes: references  a1. Waste paper -- Recycling -- Case studies  aJustine Santos, Kathryn Castor, Maxine Wenceslao, Benson Montalbo, Emman Gapasin and James Rojas