APPENDIX (continued) 



Study area 



1957 1958 1957 1'j58 1957 1958 1957 1958 1957 1958 1957 1958 1957 1958 1957 1958 



*These are mean values of two or more sequential samples taJcen at each point. 



15 MS #1033 GPO 92*282 



