| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Elementary Statistical Methods | 978-0-03-007295-6 (0-03-007295-6) | 1969 |
| Elementary statistical methods | 978-0-03-081130-2 (0-03-081130-9) | 1969 |
H. M. · H.M. Walker · H.W. · Helen Walker · M W · M. Walker · Mary Walker · Walker, Helen Mary