APA

De Paepe P., Stoops G., . (1969). Some trace elements in basaltic rocks from the Galapagos Islands. : .

Chicago

De Paepe P, Stoops G, . 1969. Some trace elements in basaltic rocks from the Galapagos Islands. : .

Harvard

De Paepe P., Stoops G., . (1969). Some trace elements in basaltic rocks from the Galapagos Islands. : .

MLA

De Paepe P, Stoops G, . Some trace elements in basaltic rocks from the Galapagos Islands. : . 1969.