TY  - JOUR
PY  - 1665//
TI  - Certain problems touching some points of navigation
JO  - Philosophical transactions of the Royal Society of London (1665)
SP  - 215
EP  - 218
VL  - 1
IS  - 13
N2  - <p>[Abstract unavailable]</p> 
LA  - 
SN  - 0370-2316
UR  - http://dx.doi.org/
ID  - ref1
ER  -