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i have buy them !"Advanced Saturn/Apollo Missions" and "Saturn Mission Payload Versatility"last one is Boeing study how to transform the S-IC in S-ID SSTOsadly, both do not have a detail Information about this S-IVB SSTO
i have buy them !
"Advanced Saturn/Apollo Missions" and "Saturn Mission Payload Versatility"
last one is Boeing study how to transform the S-IC in S-ID SSTO
sadly, both do not have a detail Information about this S-IVB SSTO
