Percy G. Gray

Noise in three groups of flats with different floor insulations

P. H. Parkin, Ann Cartwright, Percy G. Gray, 1958 .

The Length of Cigarette Stubs

Percy G. Gray, Elizabeth A. Parr, 1959 .

The Memory Factor in Social Surveys

Percy G. Gray, P. Gray, 1955 .

A Sample Survey with Both a Postal and an Interview Stage

Percy G. Gray, P. Gray, 1957 .

Examples of Interviewer Variability Taken from Two Sample Surveys

Percy G. Gray, P. Gray, 1956 .

Initial Letters of Surnames

Percy G. Gray, P. Gray, 1958 .