I have no affiliation, but if you are looking for some great Squadron Signal vehicle walkarounds or reference books check out Hobbylinc. Look at my order and the prices! I just love walkarounds, even if I don't have that model in my stash!

1 SSP2045 M113 APC In Vietnam In Action -- Authentic Scale Tank Vehicle Book -- #2045 $5.64
1 SSP5709 SdKfz 251 Walk Around Armor Color -- Authentic Scale Tank Vehicle Book -- #5709 $6.62
1 SSP5712 M3 Medium Tank Color Walk Around -- Authentic Scale Tank Vehicle Book -- #5712 $6.62
1 SSP5720 M3A1 White Scout Car Color Walk Around -- Authentic Scale Tank Vehicle Book -- #5720 $6.62
1 SSP5722 Valentine Tank Walk Around -- Authentic Scale Tank Vehicle Book -- #5722 $6.62
1 SSP5715 M113 APC Walk Around -- Authentic Scale Tank Vehicle Book -- #5715 $6.62
1 SSP5719 M5/M5A1 Stuart Walk Around -- Authentic Scale Tank Vehicle Book -- #5719 $6.62