APA Citation

Roberts, R. C. n. 1., & Roberts, R. C. n. 1. Soil map Puerto Rico: East-central sheet.

Chicago Style Citation

Roberts, Ray Carlton n. 1901, and Ray Carlton n. 1901 Roberts. Soil Map Puerto Rico: East-central Sheet.

MLA Citation

Roberts, Ray Carlton n. 1901, and Ray Carlton n. 1901 Roberts. Soil Map Puerto Rico: East-central Sheet.

Warning: These citations may not always be 100% accurate.