TY  - BOOK
AU  - Ritchie W.
AU  -  Tait D.A.
AU  -  Wood M.
AU  -  Wright R.
TI  - Mapping for field scientists
U1  - D:2, L7 
PY  - 1977///
CY  - Vancouver
PB  - David and Charles     
KW  - Surveying
N1  - Appendix 309-318p; Bibliography 319-320p
ER  -