Choosing a career; a selected list of material on occupations and careers available at the Free Library of Philadelphia. Originally prepared by te B'nai B'rith Group Vocational Guidance Service, under the editorship of Harold Kramer, director. Now revised and somewhat enlarged by the library staff.

Mode of access: Internet.

How to effectively recover free product at leaking underground storage tank sites : a guide for state regulators.

"EPA 510-R-96-001."

Metalliferous black shales and related ore deposits : program and abstracts : 1988 meeting of the United States Working Group of International Geological Correlation Program Project 254 /

Mode of access: Internet.