APA

KUMMEL B., . (1961). HISTORY OF THE EARTH AN INTRODUCTION TO HISTORICAL GEOLOGY. SAN FRANCISCO: W.H FREEMAN AND COMPANY.

Chicago

KUMMEL BERNHARD, . 1961. HISTORY OF THE EARTH AN INTRODUCTION TO HISTORICAL GEOLOGY. SAN FRANCISCO: W.H FREEMAN AND COMPANY.

Harvard

KUMMEL B., . (1961). HISTORY OF THE EARTH AN INTRODUCTION TO HISTORICAL GEOLOGY. SAN FRANCISCO: W.H FREEMAN AND COMPANY.

MLA

KUMMEL BERNHARD, . HISTORY OF THE EARTH AN INTRODUCTION TO HISTORICAL GEOLOGY. SAN FRANCISCO: W.H FREEMAN AND COMPANY. 1961.