TY  - BOOK
AU  - Coche,  A.G
AU  - Laughlin,  T.
TI  - Topography for freshwater fish culture topographical surveys: simple methods for aquaculture 
SN  - 9251025916
U1  - 639.31 20
PY  - 1989///
CY  - Rome
PB  - FAO United Nations
KW  - Topography
KW  - Fish culture
N1  - Contents 

Topographical surveys -Plan survey
How to survey by traveling
How to survey by radiating
How to survey by off set

Topographical survey  -Direct levelling
How to level by differential
How to level by profile

Topographical plan and maps
How to make scales for  plans and maps
How to make a map by plane tabling
How to map contours

Measurements for areas
How to use the strip methods for measuring
How to use the square grid methods for measuring

Topography and freshwater fish culture
What you have learned
How to make preliminary studies  for topographical




; Includes bibliographical references and index

ER  -