The site has a grid reference of SU 075 867.
The poster had grid references at its edges, used for the contents instead of page numbers.
This large data set, to which grid references have now been added, comprises information about nearly 40 000 individuals.
Look out for the grid reference which appears in each accommodation entry.
However the 1974 edition, the first to give grid references, gives the old position, doubtless an oversight.
A grid reference locates a unique square region on the map.
A grid reference in this system, such as 'H3', locates a particular square rather than a single point.
Further details of the stations, including maps and grid references.
Now look at the ambient readings in the center of that grid reference.
I wanted a date, a time and a grid reference.
