V barve CHAMPAGNE / Zlata je take:
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION * WASHINGTON, D. C. * JULY 1971
NASA CONTRACTOR REPORT
David F. Putnam
Prepared by MCDONNELL DOUGLAS ASTRONAUTICS COMPANY * Western Division
Huntington Beach, Calif. 92647
for Langley Research Center
NASA CR-1802
COMPOSITION AND CONCENTRATIVE PROPERTIES OF HUMAN URINE