PY Publication Year

(a limit field)

1994 in py

py=1994

This field contains the year in which the document was published. You can search the PY field with the following operators, as well as with in and =:

< less than,

such as py<1991

> greater than,

such as py>1993

<= less than or equal to,

such as py<=1990

>= greater than or equal to,

such as py>=1992

- within a range,

such as py=1991-1993