Prevalence and timing of oral sex with opposite-sex partners among females and males aged 15-24 years : United States, 2007-2010 /

Mode of access: Internet.

A handbook of vaccination. /

Mode of access: Internet.

History and pathology of vaccination,

Vol. 2 contains reproductions of original title pages of ten of the essays.

An historical review of the nature and results of vaccination, as unfolded in Dr. Baron's life of Jenner.

Mode of access: Internet.

The timing of airport traffic control as influenced by weather and aircraft performance.

"Meteorological study sponsored by Air Navigation Development Board under Contract Cwb-8175 with the U.S. Weather Bureau."

The nature and timing of tectonism in the western facies terrane of Nevada and California : an outline of evidence and interpretations derived from geologic maps of key areas /

Mode of access: Internet.