00507 a2200157 4500 20260603193111.0 978-621-409-297-0 330.09 P277 2025 Mathematics, science, and technology : People and earth's ecosystem Mandaluyong city . Books Atbp . Publishing. 2025 viii pages : illustrations ; 22cm 300-399 Mathematics, science, and technology Economic situation and condition ddc B 41256 41256