Operation rain-check at the Chicago Air Route Traffic Control Center, Aurora, Illinois.

Mode of access: Internet.

Hemerocallis check list, 1893 to July 1, 1957.

Mode of access: Internet.

Confederate imprints; a check list based principally on the collection of the Boston Athenæum.

v.1. Official publications.--v.2. Unofficial publications. (Vol. 2, pt. 3, Sheet music, compiled by Richard B. Harwell).

Check list of insects of Great Smoky Mountains National Park.

Mode of access: Internet.

Check list of the Cicadellidae (Homoptera) of America, north of Mexico,

A revision of the list of the North American Cicadellidae, published in 1937, by DeLong and Caldwell. cf. Introd.

Manuscripts in public and private collections in the United States.

A new and enlarged edition of "Check list of collections of personal papers in historical societies, university and public libraries, and other learned institutions in the United States," published in 1918.

A check-list of American and English periodicals,

Mode of access: Internet.

Check list of New York birds,

At head of title: University of the State of New York.

Program area selection check list.

Mode of access: Internet.

A distributional check list of the birds of Illinois,

"A joint project of the Illinois Audubon society and the Illinois state museum."

United States standard facilities flight check manual.

Mode of access: Internet.

Check list of the birds of Illinois, together with a short list of 200 commoner birds and Allen's Key to birds nests.

Publication date stamped on t.-p.

Check list of books for an undergraduate physics library.

Mode of access: Internet.

An annotated check list of some typographic sources.

Cover title.

A check list of the publications of the Department of Agriculture on the subject of plant pathology, 1837-1918.

Mimeographed.