00000cam a22000004a 4500 UP-99796217605394626 Buklod 20230503092542.0 m |o d | ta 080210s1969 xx a r |000 u|eng d (iLib)UPD-00000327340 eng DMLUC HD 1698 P52 L3 T55 Survey for hydraulic control of the Laguna de Bay complex in the Philippines. [Canada] The Associates 1969. 5 v. : ill. At head of title: United Nations. Hydraulic control. Laguna de Bay Power distribution. T. Ingledew & Associates. Book FI Paper UPD DSURP HD 1698 P52 L3 T55 Book