00323nam a2200109Ia 450000500170000008000190001710000210003624500560005726000650011330000160017858300190019420260716043541.0  a17.05.01 P8675  aPotter, K. E. D.  aAn appraisal of the hydrology and climate of Guyana  bMinistry of Works, Hydraulics and SupplyaGeorgetownGYc1970  a29 p. : map  c11/17/04kJOYD